A wiper blade (13, 41, 51, 61, 71, 81) for wiping a windshield glass of a vehicle, the wiper blade (13,41,51,61,71,81) comprising: a rubber holder attached to a tip of a wiper arm performing swinging motion on the windshield glass; a blade rubber held by the rubber holder to contact with the windshield glass; a leaf-spring member formed elastically deformable in a direction perpendicular to the windshield glass and attached to the blade rubber to disperse a pressing force of the wiper arm in a longitudinal direction of the blade rubber; and a cover provided so as to be aligned in the longitudinal direction of the rubber holder and to be swingable to the rubber holder in a direction perpendicular to the windshield glass, the cover covering the blade rubber in a state in which the blade rubber is elastically deformable to said cover in the direction perpendicular to the windshield glass, and wherein the rubber holder is formed into a U-shaped cross section having a top wall portion extending in the longitudinal direction of the rubber holder and a pair of side wall portions extending from both sides of the top wall portion toward the windshield glass, holding claws (26, 31) engaged with holding grooves of the blade rubber are respectively provided to both end portions of the side walls in a longitudinal direction of the side walls, and an intermediate portion of the blade rubber is covered with the rubber holder, characterized in that an engagement piece protruding toward the windshield glass is provided to the top wall portion of the rubber holder, a pair of leg portions protruding toward the rubber holder is provided to the cover, and the cover is detachably assembled to the rubber holder by disposing the leg portions in respective gaps between the engagement piece and the side walls. a rubber holder attached to a tip of a wiper arm performing swinging motion on the windshield glass; a blade rubber held by the rubber holder to contact with the windshield glass; a leaf-spring member formed elastically deformable in a direction perpendicular to the windshield glass and attached to the blade rubber to disperse a pressing force of the wiper arm in a longitudinal direction of the blade rubber; and a cover provided so as to be aligned in the longitudinal direction of the rubber holder and to be swingable to the rubber holder in a direction perpendicular to the windshield glass, the cover covering the blade rubber in a state in which the blade rubber is elastically deformable to said cover in the direction perpendicular to the windshield glass, and wherein the rubber holder is formed into a U-shaped cross section having a top wall portion extending in the longitudinal direction of the rubber holder and a pair of side wall portions extending from both sides of the top wall portion toward the windshield glass, holding claws (26, 31) engaged with holding grooves of the blade rubber are respectively provided to both end portions of the side walls in a longitudinal direction of the side walls, and an intermediate portion of the blade rubber is covered with the rubber holder, characterized in that an engagement piece protruding toward the windshield glass is provided to the top wall portion of the rubber holder, a pair of leg portions protruding toward the rubber holder is provided to the cover, and the cover is detachably assembled to the rubber holder by disposing the leg portions in respective gaps between the engagement piece and the side walls.