A wiper blade suitable to six types of wiper arms. A connector assembly of the wiper blade is detachably joined to a lever assembly and is detachably connected to wiper arms having first to sixth coupling units at a distal end respectively. An adaptor of the connector assembly is rotatably attached to the lever assembly. A slide cover of the connector assembly is slidably joined to the adaptor. A side lock cover of the connector assembly is detachably joined to the adaptor. The slide cover is moved to the adaptor in a first movement direction parallel to a longitudinal direction of the lever assembly to cover top contact surfaces of the first to third coupling units. The adaptor is fitted to the fourth coupling unit. The adaptor is connected to the fifth and sixth coupling units by a side pin passing through the side lock cover.