Abstract: The retainer for cut wallboard is a device for repairing a piece of wallboard from which a smaller piece has been removed. The retainer includes a closed band having opposed inner and outer faces and opposed first and second edges. A plurality of outer retaining members are attached to the first edge of the closed band, with the plurality of outer retaining members extending outwardly therefrom. Further, a plurality of inner retaining members are attached to the second edge of the closed band, with the plurality of inner retaining members extending inwardly therefrom. A plurality of resilient members are further attached to the first edge of the closed band and also extend inwardly therefrom.