Laundry treating apparatus

A laundry treating apparatus comprising:

• a drum configured to rotate about a rotation axis extending in a front-rear direction of the drum;
• and
• a lifter that is disposed at an inner circumferential surface of the drum such that a longitudinal direction of the lifter corresponds to the front-rear direction of the drum and that is configured to, based on the drum rotating, revolve around the rotation axis,
• wherein the lifter comprises a lifter frame disposed at the inner circumferential surface of the drum and a frame cover that is coupled to the lifter frame and that protrudes radially inward from the inner circumferential surface of the drum,
• wherein the lifter frame comprises (i) a frame base that is coupled to the inner circumferential surface of the drum and that includes a seating groove provided along a circumference of the frame base, (ii) a frame upper plate spaced apart from the frame base toward a center of the drum, (iii) a frame sidewall connecting the frame upper plate to the frame base, and (iv) a pair of insertion protrusions that protrude from an inner surface of the lifter frame at a central portion of the inner surface with respect to a longitudinal direction of the lifter frame, and
• wherein a pair of mounting slots are defined in the drum such that the pair of insertion protrusions are inserted into the drum through the pair of mounting slots to couple the lifter frame to the inner circumferential surface of the drum.