Abstract: A composite chair adapted for permitting a user to sit thereon. The composite chair includes a base unit and a seat unit. The seat unit includes a seat body that is mounted on the base unit and that is adapted for supporting the user's buttocks, and a pushing member that is fixedly mounted on a rear end of the seat body. The seat body is pivotable relative to the base unit for inclining the pushing member to push the user' s waist forward.