diff --git a/README.md b/README.md
index 89390df..8baae42 100644
--- a/README.md
+++ b/README.md
@@ -117,7 +117,7 @@ const webRules = getRulesForPlatform('web');
 const backendRules = getRulesForPlatform('backend');
 ```
 
-## Available Rules (50 total)
+## Available Rules (51 total)
 
 ### Expo Router Rules
 
@@ -155,6 +155,7 @@ const backendRules = getRulesForPlatform('backend');
 | ---------------------------- | -------- | -------- | ----------------------------------------------------------------- |
 | `require-use-client`         | error    | web      | Files using client-only features must have "use client" directive |
 | `no-server-import-in-client` | error    | web      | "use client" files must not import server-only modules            |
+| `no-react-native-in-web`     | error    | web      | Don't import react-native in web modules (causes ESM failures)    |
 
 ### React / JSX Rules
 
diff --git a/src/rules/index.ts b/src/rules/index.ts
index dd01b2a..98309fc 100644
--- a/src/rules/index.ts
+++ b/src/rules/index.ts
@@ -49,6 +49,7 @@ import { noSyncFs } from './no-sync-fs';
 import { preferNamedParams } from './prefer-named-params';
 import { requireUseClient } from './require-use-client';
 import { noServerImportInClient } from './no-server-import-in-client';
+import { noReactNativeInWeb } from './no-react-native-in-web';
 
 export const rules: Record<string, RuleFunction> = {
   'no-relative-paths': noRelativePaths,
@@ -101,4 +102,5 @@ export const rules: Record<string, RuleFunction> = {
   'prefer-named-params': preferNamedParams,
   'require-use-client': requireUseClient,
   'no-server-import-in-client': noServerImportInClient,
+  'no-react-native-in-web': noReactNativeInWeb,
 };
diff --git a/src/rules/meta.ts b/src/rules/meta.ts
index ef0a579..0952097 100644
--- a/src/rules/meta.ts
+++ b/src/rules/meta.ts
@@ -32,6 +32,7 @@ export const rulePlatforms: Partial<Record<string, Platform[]>> = {
   'no-tailwind-animation-classes': ['web'],
   'require-use-client': ['web'],
   'no-server-import-in-client': ['web'],
+  'no-react-native-in-web': ['web'],
 
   // Expo + Web (shared frontend)
   'no-relative-paths': ['expo', 'web'],
diff --git a/src/rules/no-react-native-in-web.ts b/src/rules/no-react-native-in-web.ts
new file mode 100644
index 0000000..2ebb70d
--- /dev/null
+++ b/src/rules/no-react-native-in-web.ts
@@ -0,0 +1,46 @@
+import traverse from '@babel/traverse';
+import type { File } from '@babel/types';
+import type { LintResult } from '../types';
+
+const RULE_NAME = 'no-react-native-in-web';
+
+const REACT_NATIVE_MODULES = ['react-native', 'react-native-web'];
+
+export function noReactNativeInWeb(ast: File, _code: string): LintResult[] {
+  const results: LintResult[] = [];
+
+  traverse(ast, {
+    ImportDeclaration(path) {
+      const source = path.node.source.value;
+      if (!REACT_NATIVE_MODULES.includes(source)) return;
+
+      const { loc } = path.node;
+      results.push({
+        rule: RULE_NAME,
+        message: `Do not import from '${source}' in web modules. Use platform-specific files (.native.tsx) or web-compatible alternatives`,
+        line: loc?.start.line ?? 0,
+        column: loc?.start.column ?? 0,
+        severity: 'error',
+      });
+    },
+
+    CallExpression(path) {
+      const { callee, loc } = path.node;
+      if (callee.type !== 'Identifier' || callee.name !== 'require') return;
+
+      const arg = path.node.arguments[0];
+      if (!arg || arg.type !== 'StringLiteral') return;
+      if (!REACT_NATIVE_MODULES.includes(arg.value)) return;
+
+      results.push({
+        rule: RULE_NAME,
+        message: `Do not require '${arg.value}' in web modules. Use platform-specific files (.native.tsx) or web-compatible alternatives`,
+        line: loc?.start.line ?? 0,
+        column: loc?.start.column ?? 0,
+        severity: 'error',
+      });
+    },
+  });
+
+  return results;
+}
diff --git a/tests/config-modes.test.ts b/tests/config-modes.test.ts
index 112bd5e..81092d3 100644
--- a/tests/config-modes.test.ts
+++ b/tests/config-modes.test.ts
@@ -123,7 +123,7 @@ describe('config modes', () => {
       expect(ruleNames).toContain('no-relative-paths');
       expect(ruleNames).toContain('expo-image-import');
       expect(ruleNames).toContain('no-stylesheet-create');
-      expect(ruleNames.length).toBe(50);
+      expect(ruleNames.length).toBe(51);
     });
   });
 });
diff --git a/tests/no-react-native-in-web.test.ts b/tests/no-react-native-in-web.test.ts
new file mode 100644
index 0000000..ed12dd7
--- /dev/null
+++ b/tests/no-react-native-in-web.test.ts
@@ -0,0 +1,67 @@
+import { describe, it, expect } from 'vitest';
+import { lintJsxCode } from '../src';
+
+const config = { rules: ['no-react-native-in-web'] };
+
+describe('no-react-native-in-web rule', () => {
+  it('should detect import from react-native', () => {
+    const code = `
+      import { View, Text } from 'react-native';
+      export default function App() {
+        return <View><Text>Hello</Text></View>;
+      }
+    `;
+    const results = lintJsxCode(code, config);
+    expect(results).toHaveLength(1);
+    expect(results[0].rule).toBe('no-react-native-in-web');
+    expect(results[0].message).toContain('react-native');
+    expect(results[0].severity).toBe('error');
+  });
+
+  it('should detect import from react-native-web', () => {
+    const code = `
+      import { View } from 'react-native-web';
+      export default function App() {
+        return <View />;
+      }
+    `;
+    const results = lintJsxCode(code, config);
+    expect(results).toHaveLength(1);
+    expect(results[0].message).toContain('react-native-web');
+  });
+
+  it('should detect require of react-native', () => {
+    const code = `
+      const { View } = require('react-native');
+      export default function App() {
+        return <View />;
+      }
+    `;
+    const results = lintJsxCode(code, config);
+    expect(results).toHaveLength(1);
+    expect(results[0].message).toContain('react-native');
+  });
+
+  it('should allow other imports', () => {
+    const code = `
+      import React from 'react';
+      import { useState } from 'react';
+      export default function App() {
+        return <div>Hello</div>;
+      }
+    `;
+    const results = lintJsxCode(code, config);
+    expect(results).toHaveLength(0);
+  });
+
+  it('should allow react-native subpackage imports', () => {
+    const code = `
+      import something from 'react-native-safe-area-context';
+      export default function App() {
+        return <div>Hello</div>;
+      }
+    `;
+    const results = lintJsxCode(code, config);
+    expect(results).toHaveLength(0);
+  });
+});