Abstract: A combination wheelchair and transfer board having a flip-back armrest. The flip-back armrest lowers upon and secures the transfer board in a vertical position at the side of the wheelchair. The armrest includes a channel for receiving a top edge of the transfer board. When the armrest is rotated back, the channel releases the top of the transfer board and the armrest is moved backwards sufficiently so that the transfer board is free to move upward. A rear landing pad is provided that supports and secures the transfer board in the vertical position at the side of the wheelchair. The rear landing pad pivots with the armrest. A plastic, self-locking plug permits the transfer board to be attached to a standard armrest receiver on a wheelchair. The self-locking plug snaps into place, and includes either a swedged portion or tabs to lock it into place.