A washing machine comprising: a tub main body that holds water; a tub cover that is coupled to the tub main body and configured to cover a front of the tub main body, the tub cover having a first insertion hole or opening; a front panel configured to cover a front of the tub cover; a detergent container, dispenser, or case detachably coupled to the tub cover and configured to extend through the front panel and the tub cover, and into the tub main body, the detergent container, dispenser, or case being inserted through the first insertion hole or opening to protrude or extend toward the interior of the tub main body; and a first seal between the detergent container, dispenser, or case and the tub cover configured to seal the tub main body, whereby the detergent container, dispenser, or case comprises: a detergent holding portion which holds detergent; a handle connected to the detergent holding portion that faces toward a front of the washing machine; and a first extension or flange which extends or protrudes radially from the handle to fix the handle to the tub cover, wherein the tub cover includes a fixing projection which protrudes or extends towards the handle, wherein the first seal is between the fixing projection and the first extension or flange and in contact with the fixing projection, whereby the fixing projection is in the first insertion hole or opening, characterised in that the fixing projection protrudes or extends toward a center of the first insertion hole or opening. a tub main body that holds water; a tub cover that is coupled to the tub main body and configured to cover a front of the tub main body, the tub cover having a first insertion hole or opening; a front panel configured to cover a front of the tub cover; a detergent container, dispenser, or case detachably coupled to the tub cover and configured to extend through the front panel and the tub cover, and into the tub main body, the detergent container, dispenser, or case being inserted through the first insertion hole or opening to protrude or extend toward the interior of the tub main body; and a first seal between the detergent container, dispenser, or case and the tub cover configured to seal the tub main body, whereby the detergent container, dispenser, or case comprises: a detergent holding portion which holds detergent; a handle connected to the detergent holding portion that faces toward a front of the washing machine; and a first extension or flange which extends or protrudes radially from the handle to fix the handle to the tub cover, wherein the tub cover includes a fixing projection which protrudes or extends towards the handle, wherein the first seal is between the fixing projection and the first extension or flange and in contact with the fixing projection, whereby the fixing projection is in the first insertion hole or opening, characterised in that the fixing projection protrudes or extends toward a center of the first insertion hole or opening. a detergent holding portion which holds detergent; a handle connected to the detergent holding portion that faces toward a front of the washing machine; and a first extension or flange which extends or protrudes radially from the handle to fix the handle to the tub cover, wherein the tub cover includes a fixing projection which protrudes or extends towards the handle,