A washing machine of the present invention comprises 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 for spraying water into the drum; and a plurality of connectors for supplying water to the respective gasket nozzles. Wherein the gasket nozzle comprises a spray guidance surface for refracting the an advancing direction of the water supplied through the connector so as to spray the water toward inside of the drum; and a plurality of protrusions provided adjacent to an finish end of the spray guidance surface on which the water guided along the spray guidance surface is separated, and arranged along an width direction of the spray guidance surface.