A clothes treating machine, comprising: a housing having a predetermined inner space; a tub located in the predetermined inner space and communicating with the predetermined inner space of the housing; a drum rotatably disposed in the tub; a dispenser assembly communicating with the tub, so that a clothes treatment agent is supplied into the tub; a drawer extending in a lengthwise direction of the dispenser assembly, inserted into the dispenser assembly, and having a predetermined inner space; and a storage container (410, 420) inserted into the predetermined inner space of the drawer, extending in the lengthwise direction, and having a predetermined inner space for accommodating the clothes treatment agent; and a check valve (416, 426) provided on the storage container (410, 420) and configured to allow or restrict communication between the predetermined inner space of the storage container (410, 420) and the dispenser assembly, characterized in that the storage container (410, 420) is provided on one side thereof with a discharge inclined portion defining a surface of the one side of the storage container (410, 420), extending to be inclined from one side to another side of the storage container in the lengthwise direction, so that the clothes treatment agent accommodated in the predetermined inner space of the storage container (410, 420) flows from the one side to the another side of the storage container (410, 420) in the lengthwise direction toward the check valve (416, 426), and in that the check valve (416, 426) comprises an intake port (416d, 426d) formed through a lower side of the check valve (416, 426) facing the discharge inclined portion, so that the clothes treatment agent introduced toward the check valve (416, 426) flows out of the storage container (410, 420). a housing having a predetermined inner space; a tub located in the predetermined inner space and communicating with the predetermined inner space of the housing; a drum rotatably disposed in the tub; a dispenser assembly communicating with the tub, so that a clothes treatment agent is supplied into the tub; a drawer extending in a lengthwise direction of the dispenser assembly, inserted into the dispenser assembly, and having a predetermined inner space; and a storage container (410, 420) inserted into the predetermined inner space of the drawer, extending in the lengthwise direction, and having a predetermined inner space for accommodating the clothes treatment agent; and a check valve (416, 426) provided on the storage container (410, 420) and configured to allow or restrict communication between the predetermined inner space of the storage container (410, 420) and the dispenser assembly, characterized in that the storage container (410, 420) is provided on one side thereof with a discharge inclined portion defining a surface of the one side of the storage container (410, 420), extending to be inclined from one side to another side of the storage container in the lengthwise direction, so that the clothes treatment agent accommodated in the predetermined inner space of the storage container (410, 420) flows from the one side to the another side of the storage container (410, 420) in the lengthwise direction toward the check valve (416, 426), and in that the check valve (416, 426) comprises an intake port (416d, 426d) formed through a lower side of the check valve (416, 426) facing the discharge inclined portion, so that the clothes treatment agent introduced toward the check valve (416, 426) flows out of the storage container (410, 420).