The child safety seat for a vehicle in accordance with the invention comprises an outer shell enclosing a seating area for a child and a protective element. The protective element comprises a housing component and an impact component, wherein the housing component is embedded into the outer shell and the impact component is mounted to the housing component, is configured to be enclosed at least partially by the housing component, and is configured to protrude laterally from the outer shell in a direction facing away from the seating area. Preferably, the housing component or the impact component comprises a deformable region adapted to cushion forces impacting on the impact component.