The present disclosure provides a child safety seat including a seat body, a headrest and a first buffer. The seat body has two seat side wings which are oppositely disposed. The first buffer is disposed along an inner side wall of the headrest, and the first buffer includes at least one first buffer layer and at least one second buffer layer. A hardness of the second buffer layer is less than that of the first buffer layer. The second buffer layer is fixed on a side of the first buffer layer and adjacent to the inner side wall of the headrest, and the first buffer layer is located at a side away from the inner side wall of the headrest. The child safety seat of the present disclosure has a good protective effect on infants, and can reduce the weight and manufacturing cost of the child safety seat.