diff --git a/packages/x-data-grid/src/components/virtualization/GridMainContainer.tsx b/packages/x-data-grid/src/components/virtualization/GridMainContainer.tsx
index c8b4ca5e33be..70d727b3afd5 100644
--- a/packages/x-data-grid/src/components/virtualization/GridMainContainer.tsx
+++ b/packages/x-data-grid/src/components/virtualization/GridMainContainer.tsx
@@ -8,6 +8,7 @@ const GridPanelAnchor = styled('div')({
   position: 'absolute',
   top: `var(--DataGrid-headersTotalHeight)`,
   left: 0,
+  width: 'calc(100% - (var(--DataGrid-hasScrollY) * var(--DataGrid-scrollbarSize)))',
 });
 
 type OwnerState = DataGridProcessedProps;