diff --git a/packages/strapi-plugin-content-type-builder/admin/src/containers/FormModal/utils/forms.js b/packages/strapi-plugin-content-type-builder/admin/src/containers/FormModal/utils/forms.js
index ddcaee7b5f..d8bbcad185 100644
--- a/packages/strapi-plugin-content-type-builder/admin/src/containers/FormModal/utils/forms.js
+++ b/packages/strapi-plugin-content-type-builder/admin/src/containers/FormModal/utils/forms.js
@@ -331,6 +331,7 @@ const forms = {
         const nameValue = get(data, 'name', null);
         const relationItems = [
           [fields.divider],
+          [fields.private],
           [fields.unique],
           [
             {
diff --git a/packages/strapi-plugin-content-type-builder/admin/src/containers/FormModal/utils/tests/forms.test.js b/packages/strapi-plugin-content-type-builder/admin/src/containers/FormModal/utils/tests/forms.test.js
new file mode 100644
index 0000000000..85d3f8fa48
--- /dev/null
+++ b/packages/strapi-plugin-content-type-builder/admin/src/containers/FormModal/utils/tests/forms.test.js
@@ -0,0 +1,11 @@
+import fields from '../forms';
+
+describe('forms', () => {
+  it('should contain private field in relation input type', () => {
+    const { items } = fields.attribute.form.advanced({}, 'relation', null);
+
+    expect(
+      items.find(relationItem => relationItem.find(item => item.name === 'private')).length
+    ).toBeTruthy();
+  });
+});
diff --git a/packages/strapi-plugin-content-type-builder/test/content-types.test.e2e.js b/packages/strapi-plugin-content-type-builder/test/content-types.test.e2e.js
index a7d06a95e0..ae5112c9ef 100644
--- a/packages/strapi-plugin-content-type-builder/test/content-types.test.e2e.js
+++ b/packages/strapi-plugin-content-type-builder/test/content-types.test.e2e.js
@@ -189,4 +189,47 @@ describe('Content Type Builder - Content types', () => {
       expect(updateRes.body.error).toMatch('multiple entries in DB');
     });
   });
+
+  describe('Private relation field', () => {
+    const singleTypeUID = 'application::test-single-type.test-single-type';
+
+    test('should add a relation field', async () => {
+      const res = await rq({
+        method: 'PUT',
+        url: `/content-type-builder/content-types/${singleTypeUID}`,
+        body: {
+          contentType: {
+            kind: 'singleType',
+            name: 'test-collection',
+            attributes: {
+              relation: {
+                private: true,
+                nature: 'oneWay',
+                target: 'plugins::users-permissions.user',
+                targetAttribute: 'test',
+              },
+            },
+          },
+        },
+      });
+
+      expect(res.statusCode).toBe(201);
+      expect(res.body).toEqual({
+        data: {
+          uid: singleTypeUID,
+        },
+      });
+    });
+
+    test('should contain a private relation field', async () => {
+      const res = await rq({
+        method: 'GET',
+        url: `/content-type-builder/content-types/${singleTypeUID}`,
+      });
+
+      expect(res.statusCode).toBe(200);
+      expect(res.body.data.schema.attributes.relation).toBeDefined();
+      expect(res.body.data.schema.attributes.relation.private).toBeTruthy();
+    });
+  });
 });
diff --git a/packages/strapi-plugin-content-type-builder/utils/attributes.js b/packages/strapi-plugin-content-type-builder/utils/attributes.js
index bd265daa60..9be70b12c8 100644
--- a/packages/strapi-plugin-content-type-builder/utils/attributes.js
+++ b/packages/strapi-plugin-content-type-builder/utils/attributes.js
@@ -85,6 +85,7 @@ const formatAttribute = (key, attribute, { model }) => {
         ['attributes', attribute.via, 'columnName'],
         undefined
       ),
+      private: attribute.private ? true : false,
       unique: attribute.unique ? true : false,
       autoPopulate: attribute.autoPopulate,
     };