A laundry treating apparatus comprising: a cabinet having an opening defined a front side of the cabinet ; a tub disposed inside the cabinet ; a drum rotatably disposed inside the tub ; and a detergent storage unit entered into and drawn out from the cabinet through the opening , wherein detergent is stored in the detergent storage unit , characterized in that : the detergent storage unit includes: a detergent storage frame having an open top face and entered into and drawn out from the cabinet through the opening ; a locking bar disposed on the detergent storage frame and restricting a drawn out distance of the detergent storage unit drawn out from the cabinet ; and a detergent cup accommodated in the detergent storage frame through the open top face of the detergent storage frame , wherein the detergent cup stores the detergent therein and includes a separation preventing protrusion protruding from a side wall of the detergent cup , wherein at least a portion of the locking bar is located above the separation preventing protrusion , and wherein the detergent cup is restricted from separation from the detergent storage frame by restricting an upward movement of the separation preventing protrusion by the locking bar . a cabinet having an opening defined a front side of the cabinet ; a tub disposed inside the cabinet ; a drum rotatably disposed inside the tub ; and a detergent storage unit entered into and drawn out from the cabinet through the opening , wherein detergent is stored in the detergent storage unit , characterized in that : the detergent storage unit includes: a detergent storage frame having an open top face and entered into and drawn out from the cabinet through the opening ; a locking bar disposed on the detergent storage frame and restricting a drawn out distance of the detergent storage unit drawn out from the cabinet ; and a detergent cup accommodated in the detergent storage frame through the open top face of the detergent storage frame , wherein the detergent cup stores the detergent therein and includes a separation preventing protrusion protruding from a side wall of the detergent cup , wherein at least a portion of the locking bar is located above the separation preventing protrusion , and wherein the detergent cup is restricted from separation from the detergent storage frame by restricting an upward movement of the separation preventing protrusion by the locking bar . the detergent storage unit includes: a detergent storage frame having an open top face and entered into and drawn out from the cabinet through the opening ; a locking bar disposed on the detergent storage frame and restricting a drawn out distance of the detergent storage unit drawn out from the cabinet ; and a detergent cup accommodated in the detergent storage frame through the open top face of the detergent storage frame , wherein the detergent cup stores the detergent therein and includes a separation preventing protrusion protruding from a side wall of the detergent cup , a detergent storage frame having an open top face and entered into and drawn out from the cabinet through the opening ; a locking bar disposed on the detergent storage frame and restricting a drawn out distance of the detergent storage unit drawn out from the cabinet ; and a detergent cup accommodated in the detergent storage frame through the open top face of the detergent storage frame , wherein the detergent cup stores the detergent therein and includes a separation preventing protrusion protruding from a side wall of the detergent cup , wherein at least a portion of the locking bar is located above the separation preventing protrusion , and wherein the detergent cup is restricted from separation from the detergent storage frame by restricting an upward movement of the separation preventing protrusion by the locking bar . <EOS>