A laundry treating apparatus comprising: a cabinet; a drawer including a drawer body extendable from the cabinet, a drawer cover for forming a top face of the drawer body, a first detergent flow channel defined in the drawer cover to define a storage space for detergent or a flow path for the detergent, and a first detergent supply hole defined to penetrate the drawer cover to inject the detergent into the first detergent flow channel; a tub including a tub body disposed inside the drawer and storing water therein, a tub cover for forming a top face of the tub body, and an exhaust hole penetrating the tub cover to communicate an interior of the tub body with the outside to discharge air inside the tub body; a drum rotatably disposed in the tub, wherein the drum accommodates laundry; a discharge flow channel (232, 233) for connecting the first detergent flow channel with the tub; a dispenser including a flow channel body fixed to the drawer, a first water supply flow channel defined in the flow channel body, an exhaust flow channel defined in the flow channel body to provide a flow path for air and separated from the first water supply flow channel, a flow channel cover for forming a top face of the flow channel body, and a cover through-hole connected to the exhaust flow channel through the flow channel cover; a first connection pipe for connecting the first water supply flow channel to a first water source; a first flow channel water supply pipe for supplying water inside the first water supply flow channel to the first detergent flow channel; and a tub exhaust pipe for connecting the exhaust flow channel with the exhaust hole. a cabinet; a drawer including a drawer body extendable from the cabinet, a drawer cover for forming a top face of the drawer body, a first detergent flow channel defined in the drawer cover to define a storage space for detergent or a flow path for the detergent, and a first detergent supply hole defined to penetrate the drawer cover to inject the detergent into the first detergent flow channel; a tub including a tub body disposed inside the drawer and storing water therein, a tub cover for forming a top face of the tub body, and an exhaust hole penetrating the tub cover to communicate an interior of the tub body with the outside to discharge air inside the tub body; a drum rotatably disposed in the tub, wherein the drum accommodates laundry; a discharge flow channel (232, 233) for connecting the first detergent flow channel with the tub; a dispenser including a flow channel body fixed to the drawer, a first water supply flow channel defined in the flow channel body, an exhaust flow channel defined in the flow channel body to provide a flow path for air and separated from the first water supply flow channel, a flow channel cover for forming a top face of the flow channel body, and a cover through-hole connected to the exhaust flow channel through the flow channel cover; a first connection pipe for connecting the first water supply flow channel to a first water source; a first flow channel water supply pipe for supplying water inside the first water supply flow channel to the first detergent flow channel; and a tub exhaust pipe for connecting the exhaust flow channel with the exhaust hole.