Child car seat

A child car seat comprising:

• a child-car-seat body including a seat part having a seat plate part and a back plate part;
• a sliding member located on a position opposed to the back plate part from a front side, the sliding member being slidable with respect to the back plate part so as to move in a height direction;
• and
• a child belt disposed on the child-car-seat body;
• wherein:
• the sliding member has a through-hole through which the child belt can pass;
• the back plate part has, at a position opposed to the through-hole, an elongate hole extending in a sliding direction of the sliding member with respect to the back plate part, the elongate hole allowing the child belt, which has passed through the through hole of the sliding member, to pass therethrough;
• a pair of first engagement parts that are spaced apart from each other in a width direction are disposed on the sliding member or the seat part, each engagement part extending in the sliding direction of the sliding member with respect to the back plate part, and a pair of first engagement pieces that are spaced apart from each other in the width direction are disposed on one of the sliding member and the seat part on which the first engagement parts are not disposed, the first engagement pieces being capable of moving away from each other and moving closer to each other;
• a second engagement part extending in the sliding direction of the sliding member with respect to the back plate part is disposed on the sliding member or the seat part, and a second engagement piece is disposed, at a position opposed to the second engagement part, on one of the sliding member and the seat part on which the second engagement part is not disposed, the second engagement piece being supported to be capable of moving closer to and moving away from one of the sliding member and the seat part on which the second engagement part is disposed;
• and
• a sliding movement of the sliding member with respect to the back plate part is enabled, by releasing an engagement between the first engagement piece and the first engagement part and by releasing an engagement between the second engagement piece and the second engagement part.