Disclosed herein is a wiper blade assembly, including: an adaptor; and a cap member connected to a predetermined region of a front of the adaptor to rotate, wherein the cap member includes one or more hollows, the adaptor includes one or more pressing plates, and the cap member is rotated relative to the one or more pressing plates in a state where the one or more pressing plates are inserted in the one or more hollows. Since a wiper arm can be easily attached or detached by the rotation of the cap member, the wipe blade assembly can be easily attached to or detached from the wiper arm even by a beginner.