The invention relates to a detergent supplying apparatus in a washer which includes a cabinet (1), a drum (4) rotatably provided in the cabinet and a tub (3) fixed outside the drum (4). The detergent supplying apparatus includes: a water feed pipe (21) for feeding water; a detergent container (100) including water storage pool (104) having water inlet opening (141) connected to the water feed pipe, for being supplied with water through the water inlet opening (141), detergent pool (101 to 103) dividedly formed at a side of the water storage pool (104 to 106) by overflow compartments (108 to 110), for storing detergent, and drain (107) provided at a passage end of the detergent pools (104 to 106), whereby the water fed to the water storage pools (104 to 106) overflows the overflow compartments (108 to 110) to be fed to the detergent pools (101 to 103), and discharges through the drain (107); and detergent discharge pipe (25) of which one end is connected to the drain of the detergent container and the other end is connected to the tub of the washer, for guiding the detergent and water discharged through the drain into the tub.