A drawer comprising: a drawer frame extending in a lengthwise direction and configured to be drawn out of a housing; and a storage container (410, 420) accommodating a clothes treatment agent therein and inserted into the drawer frame, the storage container (410, 420) comprises: a storage body portion (411, 421) configured to accommodate the clothes treatment agent therein; a check valve (416, 426) protruding at one side of the storage body portion (411, 421) and configured to allow the clothes treatment agent to be discharged selectively; a storage cover portion (412, 422) configured to cover the storage body portion (411, 421); and characterized in that the storage container further comprises: a through hole (415, 425) formed on the storage cover portion (412, 422), and located on another side opposite to the one side of the storage container (410, 420) where the check valve (416, 426) is disposed to prevent the clothes treatment agent accommodated in the storage container (410, 420) from leaking through the through hole (415, 425), the through hole formed in a penetrating manner so that inside and outside of the storage body portion (411, 421) communicate with each other; wherein the drawer frame comprises a rear end portion formed to be partially open to accommodate the check valve (416, 426) therein, and wherein the rear end portion comprises a partition member configured to prevent a movement of the check valve (416, 426) in an up and down direction. a drawer frame extending in a lengthwise direction and configured to be drawn out of a housing; and a storage container (410, 420) accommodating a clothes treatment agent therein and inserted into the drawer frame, the storage container (410, 420) comprises: a storage body portion (411, 421) configured to accommodate the clothes treatment agent therein; a check valve (416, 426) protruding at one side of the storage body portion (411, 421) and configured to allow the clothes treatment agent to be discharged selectively; a storage cover portion (412, 422) configured to cover the storage body portion (411, 421); and characterized in that the storage container further comprises: a through hole (415, 425) formed on the storage cover portion (412, 422), and located on another side opposite to the one side of the storage container (410, 420) where the check valve (416, 426) is disposed to prevent the clothes treatment agent accommodated in the storage container (410, 420) from leaking through the through hole (415, 425), the through hole formed in a penetrating manner so that inside and outside of the storage body portion (411, 421) communicate with each other; wherein the drawer frame comprises a rear end portion formed to be partially open to accommodate the check valve (416, 426) therein, and wherein the rear end portion comprises a partition member configured to prevent a movement of the check valve (416, 426) in an up and down direction. a storage body portion (411, 421) configured to accommodate the clothes treatment agent therein; a check valve (416, 426) protruding at one side of the storage body portion (411, 421) and configured to allow the clothes treatment agent to be discharged selectively; a storage cover portion (412, 422) configured to cover the storage body portion (411, 421); and characterized in that the storage container further comprises: a through hole (415, 425) formed on the storage cover portion (412, 422), and located on another side opposite to the one side of the storage container (410, 420) where the check valve (416, 426) is disposed to prevent the clothes treatment agent accommodated in the storage container (410, 420) from leaking through the through hole (415, 425), the through hole formed in a penetrating manner so that inside and outside of the storage body portion (411, 421) communicate with each other; wherein the drawer frame comprises a rear end portion formed to be partially open to accommodate the check valve (416, 426) therein, and wherein the rear end portion comprises a partition member configured to prevent a movement of the check valve (416, 426) in an up and down direction. a through hole (415, 425) formed on the storage cover portion (412, 422), and located on another side opposite to the one side of the storage container (410, 420) where the check valve (416, 426) is disposed to prevent the clothes treatment agent accommodated in the storage container (410, 420) from leaking through the through hole (415, 425), the through hole formed in a penetrating manner so that inside and outside of the storage body portion (411, 421) communicate with each other; wherein the drawer frame comprises a rear end portion formed to be partially open to accommodate the check valve (416, 426) therein, and wherein the rear end portion comprises a partition member configured to prevent a movement of the check valve (416, 426) in an up and down direction.