diff --git a/packages/core/database/src/__tests__/operator/string-operator.test.ts b/packages/core/database/src/__tests__/operator/string-operator.test.ts
index d3bc960d7..696d1cba0 100644
--- a/packages/core/database/src/__tests__/operator/string-operator.test.ts
+++ b/packages/core/database/src/__tests__/operator/string-operator.test.ts
@@ -24,6 +24,22 @@ describe('string operator', () => {
     });
   });
 
+  it('should escape underscore in inlcude operator', async () => {
+    const u1 = await db.getRepository('users').create({
+      values: {
+        name: 'names of u1',
+      },
+    });
+
+    const u1Res = await db.getRepository('users').findOne({
+      filter: {
+        'name.$includes': '_',
+      },
+    });
+
+    expect(u1Res).toBeNull();
+  });
+
   it('should query with include operator', async () => {
     const u1 = await db.getRepository('users').create({
       values: {
diff --git a/packages/core/database/src/operators/string.ts b/packages/core/database/src/operators/string.ts
index c87a34b73..4c688ebd6 100644
--- a/packages/core/database/src/operators/string.ts
+++ b/packages/core/database/src/operators/string.ts
@@ -1,11 +1,15 @@
 import { Op } from 'sequelize';
 import { isPg } from './utils';
 
+function escapeLike(value: string) {
+  return value.replace(/[_%]/g, '\\$&');
+}
+
 export default {
   $includes(value, ctx) {
     if (Array.isArray(value)) {
       const conditions = value.map((item) => ({
-        [isPg(ctx) ? Op.iLike : Op.like]: `%${item}%`,
+        [isPg(ctx) ? Op.iLike : Op.like]: `%${escapeLike(item)}%`,
       }));
 
       return {
@@ -14,14 +18,14 @@ export default {
     }
 
     return {
-      [isPg(ctx) ? Op.iLike : Op.like]: `%${value}%`,
+      [isPg(ctx) ? Op.iLike : Op.like]: `%${escapeLike(value)}%`,
     };
   },
 
   $notIncludes(value, ctx) {
     if (Array.isArray(value)) {
       const conditions = value.map((item) => ({
-        [isPg(ctx) ? Op.notILike : Op.notLike]: `%${item}%`,
+        [isPg(ctx) ? Op.notILike : Op.notLike]: `%${escapeLike(item)}%`,
       }));
 
       return {
@@ -30,14 +34,14 @@ export default {
     }
 
     return {
-      [isPg(ctx) ? Op.notILike : Op.notLike]: `%${value}%`,
+      [isPg(ctx) ? Op.notILike : Op.notLike]: `%${escapeLike(value)}%`,
     };
   },
 
   $startsWith(value, ctx) {
     if (Array.isArray(value)) {
       const conditions = value.map((item) => ({
-        [isPg(ctx) ? Op.iLike : Op.like]: `${item}%`,
+        [isPg(ctx) ? Op.iLike : Op.like]: `${escapeLike(item)}%`,
       }));
 
       return {
@@ -46,14 +50,14 @@ export default {
     }
 
     return {
-      [isPg(ctx) ? Op.iLike : Op.like]: `${value}%`,
+      [isPg(ctx) ? Op.iLike : Op.like]: `${escapeLike(value)}%`,
     };
   },
 
   $notStartsWith(value, ctx) {
     if (Array.isArray(value)) {
       const conditions = value.map((item) => ({
-        [isPg(ctx) ? Op.notILike : Op.notLike]: `${item}%`,
+        [isPg(ctx) ? Op.notILike : Op.notLike]: `${escapeLike(item)}%`,
       }));
 
       return {
@@ -62,14 +66,14 @@ export default {
     }
 
     return {
-      [isPg(ctx) ? Op.notILike : Op.notLike]: `${value}%`,
+      [isPg(ctx) ? Op.notILike : Op.notLike]: `${escapeLike(value)}%`,
     };
   },
 
   $endWith(value, ctx) {
     if (Array.isArray(value)) {
       const conditions = value.map((item) => ({
-        [isPg(ctx) ? Op.iLike : Op.like]: `%${item}`,
+        [isPg(ctx) ? Op.iLike : Op.like]: `%${escapeLike(item)}`,
       }));
 
       return {
@@ -78,14 +82,14 @@ export default {
     }
 
     return {
-      [isPg(ctx) ? Op.iLike : Op.like]: `%${value}`,
+      [isPg(ctx) ? Op.iLike : Op.like]: `%${escapeLike(value)}`,
     };
   },
 
   $notEndWith(value, ctx) {
     if (Array.isArray(value)) {
       const conditions = value.map((item) => ({
-        [isPg(ctx) ? Op.notILike : Op.notLike]: `%${item}`,
+        [isPg(ctx) ? Op.notILike : Op.notLike]: `%${escapeLike(item)}`,
       }));
 
       return {
@@ -94,7 +98,7 @@ export default {
     }
 
     return {
-      [isPg(ctx) ? Op.notILike : Op.notLike]: `%${value}`,
+      [isPg(ctx) ? Op.notILike : Op.notLike]: `%${escapeLike(value)}`,
     };
   },
 } as Record<string, any>;