A washing machine comprising: a casing; a tub disposed inside the casing; a drum rotatably provided inside the tub, for accommodating laundry therein; and a gasket interposed between the casing and the tub, for preventing water in the tub from leaking between the tub and the casing, wherein the gasket comprises: a plurality of gasket nozzles (160, 170) for spraying water into the drum; and a plurality of connectors (123, 124) for supplying water to the respective gasket nozzles (160, 170), and wherein the gasket nozzle (160, 170) comprises: a spray guidance surface for refracting an advancing direction of the water supplied through the connector (123, 124) so as to spray the water toward inside of the drum; a flow channel narrowing surface for reinforcing a flow rate of the water advancing toward the finish end of the spray guidance surface by limiting a lateral movement of the water discharged from an inlet to the spray guidance surface; an inlet forming surface in which the inlet communicated with the connector (123, 124) is formed, wherein the water is flowed through the inlet, and an interval forming surface formed between the inlet forming surface and the spray guidance surface so that the spray guidance surface is spaced apart from the inlet forming surface, and the flow channel narrowing surface is extended along the spray guidance surface from the interval forming surface, characterized by: a plurality of protrusions provided adjacent to a finish end of the spray guidance surface on which the water guided along the spray guidance surface is separated, and arranged along a width direction of the spray guidance surface; wherein the plurality of gasket nozzles and the gasket are integrally formed through injection molding. a casing; a tub disposed inside the casing; a drum rotatably provided inside the tub, for accommodating laundry therein; and a gasket interposed between the casing and the tub, for preventing water in the tub from leaking between the tub and the casing, wherein the gasket comprises: a plurality of gasket nozzles (160, 170) for spraying water into the drum; and a plurality of connectors (123, 124) for supplying water to the respective gasket nozzles (160, 170), and wherein the gasket nozzle (160, 170) comprises: a plurality of gasket nozzles (160, 170) for spraying water into the drum; and a plurality of connectors (123, 124) for supplying water to the respective gasket nozzles (160, 170), and wherein the gasket nozzle (160, 170) comprises: a spray guidance surface for refracting an advancing direction of the water supplied through the connector (123, 124) so as to spray the water toward inside of the drum; a flow channel narrowing surface for reinforcing a flow rate of the water advancing toward the finish end of the spray guidance surface by limiting a lateral movement of the water discharged from an inlet to the spray guidance surface; an inlet forming surface in which the inlet communicated with the connector (123, 124) is formed, wherein the water is flowed through the inlet, and an interval forming surface formed between the inlet forming surface and the spray guidance surface so that the spray guidance surface is spaced apart from the inlet forming surface, and the flow channel narrowing surface is extended along the spray guidance surface from the interval forming surface, characterized by: a plurality of protrusions provided adjacent to a finish end of the spray guidance surface on which the water guided along the spray guidance surface is separated, and arranged along a width direction of the spray guidance surface; wherein the plurality of gasket nozzles and the gasket are integrally formed through injection molding. a plurality of protrusions provided adjacent to a finish end of the spray guidance surface on which the water guided along the spray guidance surface is separated, and arranged along a width direction of the spray guidance surface; wherein the plurality of gasket nozzles and the gasket are integrally formed through injection molding.