A laundry treating apparatus is provided that may include a cabinet provided with an introduction port for introduction of laundry, a tub arranged in the cabinet to store washing water and provided with a tub introduction port that communicates with the introduction port, a drum rotatably provided in the tub and adapted to accommodate the laundry introduced through the tub introduction port, a detergent supply module positioned at a lower portion of the introduction port to store a liquid detergent and to provide the stored liquid detergent to the tub, and a water supply device to supply washing water to the tub and to rinse the detergent supply module using the washing water supplied to the tub.