Child safety seat for vehicle

The object of the invention to improve significantly the safety of a child sitting in a safety seat in a vehicle in case of a side impact will be solved by a child safety seat for a vehicle according to the invention comprising an outer shell (2) with a seating area (4) for a child (6) and side wings (5) located on both sides of the seating area (4), whereas at least one side wing (5) comprises at least one side-impact-pusher-element (1).