The present disclosure relates to a detergent supply device, including a housing (210) disposed to extend in one direction; a storage container frame (210d) withdrawably mounted in the housing; a first storage container (221) and a second storage container (222) in which different first and second laundry detergents are respectively stored, and mounted in parallel to each other in the storage container frame; and a laundry detergent pump (231, 232) provided at a rear portion of the housing to move each laundry detergent accommodated in the first and second storage containers toward the housing, wherein a laundry detergent passage (211, 212) is disposed on a lower surface of the housing to extend so as to move laundry detergent introduced thereinto toward a detergent input hole (214), and the laundry detergent passage is divided into different movement paths by a separation wall (213), and a laundry treating apparatus including the same.
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