diff --git a/README.md b/README.md
index 71d633b..22a9776 100644
--- a/README.md
+++ b/README.md
@@ -84,7 +84,10 @@ Create config file in project root
 module.exports = {
   input: 'api', // "input" of aspida is "output" for openapi2aspida
   outputEachDir: true, // Generate $api.ts in each endpoint directory
-  openapi: { inputFile: 'https://petstore.swagger.io/v2/swagger.json' },
+  openapi: {
+    inputFile: 'https://petstore.swagger.io/v2/swagger.json',
+    includeDeprecated: false, // Optional: include deprecated fields/endpoints (default: false)
+  },
 };
 ```
 
diff --git a/samples/deprecated-test.yml b/samples/deprecated-test.yml
new file mode 100644
index 0000000..a1b0193
--- /dev/null
+++ b/samples/deprecated-test.yml
@@ -0,0 +1,25 @@
+openapi: 3.0.0
+info:
+  title: Test API
+  version: 1.0.0
+paths:
+  /test:
+    get:
+      deprecated: true
+      responses:
+        '200':
+          description: Success
+    post:
+      responses:
+        '200':
+          description: Success
+components:
+  schemas:
+    TestSchema:
+      type: object
+      properties:
+        active_field:
+          type: string
+        deprecated_field:
+          type: string
+          deprecated: true
diff --git a/src/buildTemplate.ts b/src/buildTemplate.ts
index 5c13f4c..be0888f 100644
--- a/src/buildTemplate.ts
+++ b/src/buildTemplate.ts
@@ -6,11 +6,14 @@ import resolveExternalRefs from './resolveExternalRefs';
 
 const isV3 = (openapi: OpenAPI.Document): openapi is OpenAPIV3.Document => 'openapi' in openapi;
 
-export default async ({ input, isYaml }: Config) => {
+export default async (config: Config) => {
+  const { input, isYaml } = config;
   const openapi = await SwaggerParser.parse(input, { parse: { json: !isYaml } });
   const docs = isV3(openapi)
     ? openapi
     : await require('swagger2openapi').convertObj(openapi, { direct: true, resolveInternal: true });
 
-  return resolveExternalRefs(docs, typeof input === 'string' ? input : '').then(buildV3);
+  return resolveExternalRefs(docs, typeof input === 'string' ? input : '').then((resolvedDocs) =>
+    buildV3(resolvedDocs, config),
+  );
 };
diff --git a/src/buildV3.ts b/src/buildV3.ts
index e137248..ecf0aaf 100644
--- a/src/buildV3.ts
+++ b/src/buildV3.ts
@@ -1,4 +1,5 @@
 import type { OpenAPIV3 } from 'openapi-types';
+import { setIncludeDeprecated } from './builderUtils/conversionContext';
 import {
   $ref2Type,
   BINARY_TYPE,
@@ -15,6 +16,7 @@ import requestBodies2Props from './builderUtils/requestBodies2Props';
 import { resolveParamsRef, resolveReqRef, resolveResRef } from './builderUtils/resolvers';
 import responses2Props from './builderUtils/responses2Props';
 import schemas2Props from './builderUtils/schemas2Props';
+import type { Config } from './getConfig';
 
 const methodNames = ['get', 'post', 'put', 'delete', 'head', 'options', 'patch'] as const;
 
@@ -23,10 +25,14 @@ const getParamsList = (
   params?: (OpenAPIV3.ReferenceObject | OpenAPIV3.ParameterObject)[],
 ) => params?.map((p) => (isRefObject(p) ? resolveParamsRef(openapi, p.$ref) : p)) || [];
 
-export default (openapi: OpenAPIV3.Document) => {
+export default (openapi: OpenAPIV3.Document, config: Config) => {
+  setIncludeDeprecated(config.includeDeprecated || false);
+
   const files: { file: string[]; methods: string }[] = [];
-  const schemas = schemas2Props(openapi.components?.schemas, openapi) || [];
-  const parameters = parameters2Props(openapi.components?.parameters, openapi) || [];
+  const schemas =
+    schemas2Props(openapi.components?.schemas, openapi, config.includeDeprecated) || [];
+  const parameters =
+    parameters2Props(openapi.components?.parameters, openapi, config.includeDeprecated) || [];
   const requestBodies = requestBodies2Props(openapi.components?.requestBodies) || [];
   const responses = responses2Props(openapi.components?.responses) || [];
   const headers = headers2Props(openapi.components?.headers) || [];
@@ -67,7 +73,7 @@ export default (openapi: OpenAPIV3.Document) => {
           .map<Prop | null>((method) => {
             const target = openapi.paths[path]![method]!;
 
-            if (target.deprecated) return null;
+            if (target.deprecated && !config.includeDeprecated) return null;
 
             const params: Prop[] = [];
 
@@ -82,6 +88,9 @@ export default (openapi: OpenAPIV3.Document) => {
                 (p) => {
                   if (isRefObject(p)) {
                     const ref = resolveParamsRef(openapi, p.$ref);
+
+                    if (ref.deprecated && !config.includeDeprecated) return;
+
                     const val = {
                       isArray: false,
                       isEnum: false,
@@ -102,6 +111,8 @@ export default (openapi: OpenAPIV3.Document) => {
                         break;
                     }
                   } else {
+                    if (p.deprecated && !config.includeDeprecated) return;
+
                     const value = schema2value(p.schema);
                     if (!value) return;
 
diff --git a/src/builderUtils/conversionContext.ts b/src/builderUtils/conversionContext.ts
new file mode 100644
index 0000000..5de3959
--- /dev/null
+++ b/src/builderUtils/conversionContext.ts
@@ -0,0 +1,7 @@
+let includeDeprecated = false;
+
+export const setIncludeDeprecated = (value: boolean) => {
+  includeDeprecated = value;
+};
+
+export const getIncludeDeprecated = (): boolean => includeDeprecated;
diff --git a/src/builderUtils/converters.ts b/src/builderUtils/converters.ts
index c1a40a3..3a4b532 100644
--- a/src/builderUtils/converters.ts
+++ b/src/builderUtils/converters.ts
@@ -1,4 +1,5 @@
 import type { OpenAPIV3 } from 'openapi-types';
+import { getIncludeDeprecated } from './conversionContext';
 import type { Prop, PropValue } from './props2String';
 
 export const defKey2defName = (key: string) =>
@@ -53,7 +54,8 @@ const object2value = (obj: OpenAPIV3.NonArraySchemaObject): Prop[] => {
   const value = Object.keys(properties)
     .filter((name) => {
       const target = properties[name];
-      return isRefObject(target) || !target.deprecated;
+      if (isRefObject(target)) return true;
+      return getIncludeDeprecated() || !target.deprecated;
     })
     .map<Prop | null>((name) => {
       const val = schema2value(properties[name]);
diff --git a/src/builderUtils/parameters2Props.ts b/src/builderUtils/parameters2Props.ts
index 5d50b76..c2d4366 100644
--- a/src/builderUtils/parameters2Props.ts
+++ b/src/builderUtils/parameters2Props.ts
@@ -11,12 +11,17 @@ import { resolveParamsRef } from './resolvers';
 
 export type Parameter = { name: string; prop: string | Prop };
 
-export default (params: OpenAPIV3.ComponentsObject['parameters'], openapi: OpenAPIV3.Document) =>
+export default (
+  params: OpenAPIV3.ComponentsObject['parameters'],
+  openapi: OpenAPIV3.Document,
+  includeDeprecated = false,
+) =>
   params &&
   Object.keys(params)
     .filter((defKey) => {
       const target = params[defKey];
-      return !(isRefObject(target) ? resolveParamsRef(openapi, target.$ref) : target).deprecated;
+      const resolved = isRefObject(target) ? resolveParamsRef(openapi, target.$ref) : target;
+      return includeDeprecated || !resolved.deprecated;
     })
     .map((defKey) => {
       const target = params[defKey];
diff --git a/src/builderUtils/schemas2Props.ts b/src/builderUtils/schemas2Props.ts
index 2a0fee6..73bee0a 100644
--- a/src/builderUtils/schemas2Props.ts
+++ b/src/builderUtils/schemas2Props.ts
@@ -5,12 +5,17 @@ import { resolveSchemasRef } from './resolvers';
 
 export type Schema = { name: string; value: PropValue };
 
-export default (schemas: OpenAPIV3.ComponentsObject['schemas'], openapi: OpenAPIV3.Document) =>
+export default (
+  schemas: OpenAPIV3.ComponentsObject['schemas'],
+  openapi: OpenAPIV3.Document,
+  includeDeprecated = false,
+) =>
   schemas &&
   Object.keys(schemas)
     .filter((defKey) => {
       const target = schemas[defKey];
-      return !(isRefObject(target) ? resolveSchemasRef(openapi, target.$ref) : target).deprecated;
+      const resolved = isRefObject(target) ? resolveSchemasRef(openapi, target.$ref) : target;
+      return includeDeprecated || !resolved.deprecated;
     })
     .map((defKey) => {
       const value = schema2value(schemas[defKey]);
diff --git a/src/getConfig.ts b/src/getConfig.ts
index 5a1413e..dcf00e9 100644
--- a/src/getConfig.ts
+++ b/src/getConfig.ts
@@ -6,6 +6,7 @@ export type Config = Pick<AspidaConfig, 'outputEachDir' | 'outputMode' | 'traili
   input: string | OpenAPI.Document;
   output: string;
   isYaml: boolean;
+  includeDeprecated?: boolean;
 };
 
 export type ConfigFile = AspidaConfig & {
@@ -13,6 +14,7 @@ export type ConfigFile = AspidaConfig & {
     inputFile: string;
     yaml?: boolean;
     outputDir?: string;
+    includeDeprecated?: boolean;
   };
 };
 
@@ -25,6 +27,7 @@ const createConfig = (config: ConfigFile): Config => {
     outputEachDir: config.outputEachDir,
     outputMode: config.outputMode,
     isYaml: openapi.yaml ?? !openapi.inputFile.endsWith('.json'),
+    includeDeprecated: openapi.includeDeprecated ?? false,
   };
 };
 
diff --git a/tests/index.spec.ts b/tests/index.spec.ts
index 2ea6ac0..23a9f14 100644
--- a/tests/index.spec.ts
+++ b/tests/index.spec.ts
@@ -37,4 +37,51 @@ describe('cli test', () => {
       }),
     );
   });
+
+  describe('includeDeprecated configuration', () => {
+    beforeAll(async () => {
+      const configExclude = {
+        input: '_test-deprecated-exclude',
+        outputEachDir: true,
+        openapi: { inputFile: 'samples/deprecated-test.yml', includeDeprecated: false },
+      };
+
+      const configInclude = {
+        input: '_test-deprecated-include',
+        outputEachDir: true,
+        openapi: { inputFile: 'samples/deprecated-test.yml', includeDeprecated: true },
+      };
+
+      await Promise.all([build(configExclude)[0], build(configInclude)[0]]);
+    });
+
+    afterAll(() => {
+      fs.rmSync('_test-deprecated-exclude', { recursive: true });
+      fs.rmSync('_test-deprecated-include', { recursive: true });
+    });
+
+    test('main', async () => {
+      const excludeIndexContent = fs.readFileSync('_test-deprecated-exclude/test/index.ts', 'utf8');
+      expect(excludeIndexContent).not.toContain('get:');
+      expect(excludeIndexContent).toContain('post:');
+
+      const includeIndexContent = fs.readFileSync('_test-deprecated-include/test/index.ts', 'utf8');
+      expect(includeIndexContent).toContain('get:');
+      expect(includeIndexContent).toContain('post:');
+
+      const excludeTypesContent = fs.readFileSync(
+        '_test-deprecated-exclude/@types/index.ts',
+        'utf8',
+      );
+      expect(excludeTypesContent).not.toContain('deprecated_field');
+      expect(excludeTypesContent).toContain('active_field');
+
+      const includeTypesContent = fs.readFileSync(
+        '_test-deprecated-include/@types/index.ts',
+        'utf8',
+      );
+      expect(includeTypesContent).toContain('deprecated_field');
+      expect(includeTypesContent).toContain('active_field');
+    });
+  });
 });