A laundry treating apparatus includes a cabinet, a drawer body, a tub including a tub body disposed within the drawer body to configured to receive water and a tub cover coupled to a top side of the tub body and having a tub entrance configured to receive laundry, a drum disposed within the tub body and configured to accommodate the laundry and having a drum entrance for putting the laundry by communicating with the tub entrance, a driver disposed under a bottom side of the tub body and configured to provide power for rotating the drum, a door configured to slide on a top side of the tub cover to open/close the tub entrance, and a door opening detection sensor disposed at the tub cover to detect an opening/closing of the door by contacting with the door that slides on the tub cover.