A laundry treating apparatus includes a tub, a drum, a cover defining a detergent inlet, a storage body configured to store the detergent, a barrier partitioning an interior of the storage body into first and second detergent spaces, a storage unit water supply nozzle configured to supply water to the first detergent space, a first body through hole defined at a bottom surface of the storage body, a first discharge pipe, a second discharge pipe, a siphon formation pipe surrounding the first discharge pipe and being configured to flow liquid from the first detergent space to the first body through hole based on a liquid level inside the first detergent space, and a space communication unit configured to flow liquid from the first detergent space to the second detergent space based on liquid not being discharged to an outside of the first detergent space through the first body through hole.