A child seat has side walls on left and right sides of a squab portion thereof, and recessed portions for a seat belt passage, respectively. In case of a relatively large-sized infant, a seat belt installed in a vehicle and designed primarily for use by an adult is placed to extend across the squab portion. The seat belt passes through the recessed portions so as to extend closely with the infant's body to protect the infant. In case of a relatively small-sized infant, an impact shield is attached to the seat belt, so that the infant can be protected by the seat belt via the impact shield. Fitting members are fitted in the recessed portions to make the tops of the side walls flat when using the impact shield. The impact shield is stably placed on the side walls having the flat tops.
A booster seat having a body including a seat back and a seat pan for supporting an occupant thereon and an adjustable thigh support coupled to the seat pan and being movable closer to or further away from the seat pan. The booster seat further includes a pair of adjustable arm rests coupled to the body, each arm rest being located on opposed sides of the body and being pivotable about an axis that extends generally transverse to the body. The booster seat includes a pair of head rests coupled to the seat back, each head rest being located on opposed sides of the seat back and being pivotable about an axis that extends generally along the height of the body.
