A laundry treating apparatus includes: a cabinet with an inlet and a door; a tub having a tub inlet; a drum inside the tub and having a drum inlet; an insulator including a first clamp body fixed to the inlet, a second clamp fixed to the tub inlet, a connecting body connecting the first clamp body with the second clamp body and forming a space therebetween to store liquid, and an inlet pipe passing through the first clamp body; a storage inside the cabinet for storing detergent; a storage connecting pipe for discharging the detergent; an insulator connecting pipe connected to the inlet pipe; a trap forming pipe between the storage connecting pipe and the insulator connecting pipe; a guide provided in the first clamp body, guiding the liquid discharged from the inlet pipe toward the tub inlet; and a connecting path connecting the guide with the connecting body.