Structures and formation methods of a semiconductor device structure are provided. The semiconductor device structure includes a gate stack over a semiconductor substrate and a protection element over the gate stack. A top of the protection element is wider than a bottom of the protection element. The semiconductor device structure also includes a spacer element over a side surface of the protection element and a sidewall of the gate stack. The semiconductor device structure further includes a conductive contact electrically connected to a conductive feature over the semiconductor substrate.
