diff --git a/e2e/testcafe-devextreme/tests/dataGrid/sticky/common/etalons/T1303134_boolean_column_checkboxes_with_fixed_columns (fluent.blue.light).png b/e2e/testcafe-devextreme/tests/dataGrid/sticky/common/etalons/T1303134_boolean_column_checkboxes_with_fixed_columns (fluent.blue.light).png
new file mode 100644
index 000000000000..632e7b3d696b
Binary files /dev/null and b/e2e/testcafe-devextreme/tests/dataGrid/sticky/common/etalons/T1303134_boolean_column_checkboxes_with_fixed_columns (fluent.blue.light).png differ
diff --git a/e2e/testcafe-devextreme/tests/dataGrid/sticky/common/stickyColumns.ts b/e2e/testcafe-devextreme/tests/dataGrid/sticky/common/stickyColumns.ts
index 3b4613e932a2..0fe17a68f6ea 100644
--- a/e2e/testcafe-devextreme/tests/dataGrid/sticky/common/stickyColumns.ts
+++ b/e2e/testcafe-devextreme/tests/dataGrid/sticky/common/stickyColumns.ts
@@ -232,3 +232,34 @@ test.meta({ browserSize: [1000, 800] })('The grid should display correctly when
   ...defaultConfig,
   dataSource: [],
 }));
+
+test('Boolean column checkboxes should display correctly when there are fixed columns (T1303134)', async (t) => {
+  // arrange
+  const dataGrid = new DataGrid('#container');
+  const { takeScreenshot, compareResults } = createScreenshotsComparer(t);
+
+  await t.expect(dataGrid.isReady()).ok();
+
+  // act
+  await dataGrid.scrollTo(t, { x: 100 });
+
+  await testScreenshot(t, takeScreenshot, 'T1303134_boolean_column_checkboxes_with_fixed_columns.png', { element: dataGrid.element });
+
+  // assert
+  await t
+    .expect(compareResults.isValid())
+    .ok(compareResults.errorMessages());
+}).before(async () => createWidget('dxDataGrid', {
+  dataSource: [
+    { id: 1, text: 'item 1', enabled: false },
+    { id: 2, text: 'item 2', enabled: true },
+    { id: 3, text: 'item 3' },
+  ],
+  keyExpr: 'id',
+  columns: [{
+    dataField: 'id',
+    fixed: true,
+  }, 'enabled', 'text'],
+  columnWidth: 200,
+  width: 400,
+}));
diff --git a/packages/devextreme-scss/scss/widgets/fluent/checkBox/_index.scss b/packages/devextreme-scss/scss/widgets/fluent/checkBox/_index.scss
index e4407a113db2..35250bf909bd 100644
--- a/packages/devextreme-scss/scss/widgets/fluent/checkBox/_index.scss
+++ b/packages/devextreme-scss/scss/widgets/fluent/checkBox/_index.scss
@@ -21,7 +21,7 @@
   font-size: $fluent-checkbox-icon-font-size;
 
   &::before {
-    z-index: 2;
+    z-index: 1;
   }
 }
 
diff --git a/packages/devextreme-scss/scss/widgets/material/checkBox/_index.scss b/packages/devextreme-scss/scss/widgets/material/checkBox/_index.scss
index d46841298d93..aed69faa598c 100644
--- a/packages/devextreme-scss/scss/widgets/material/checkBox/_index.scss
+++ b/packages/devextreme-scss/scss/widgets/material/checkBox/_index.scss
@@ -86,7 +86,7 @@ $material-checkbox-ripple-transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
   }
 
   &::before {
-    z-index: 2;
+    z-index: 1;
   }
 
   .dx-checkbox-checked & {