Child safety seat

A child safety seat comprising:

• a seat shell having two sidewalls respectively provided at a left and a right side of the seat shell for restricting sideways movement of a child sitting on the seat shell;
• two buffering parts respectively connected with the two sidewalls of the seat shell, each of the two buffering parts being movable between a first position corresponding to a stowed state where the buffering part is retracted toward the corresponding sidewall, and a second position corresponding to a deployed state where the buffering part protrudes sideways from the corresponding sidewall;
• two retaining mechanisms operable to respectively hold the two buffering parts in the first position;
• and
• a release mechanism including an operating device that is respectively connected operatively with the two retaining mechanisms, the operating device being operable to concurrently release the two buffering parts from the hold of the two retaining mechanisms for movement of the two buffering parts from the first position to the second position.