A laundry treating apparatus may include a cabinet detachably provided on a first treating apparatus exhibiting a laundry treating apparatus and forming an external appearance of the laundry treating apparatus. A drawer may be provided to be withdrawn from the cabinet and an input hole may be formed thereon. A tub provided within the drawer body may store wash water. A detergent supply unit may be provided to be withdrawn from the drawer body toward a center of the input hole and provide a space for storing detergent. A water supply unit may supply wash water to the detergent supply unit to supply the detergent stored in the detergent supply unit to the tub body.