A vehicle rear door includes a door panel, a door frame, a division bar, and a movable window. The movable window has a flange portion formed with teeth. The division bar includes upper and lower division bars which are separately arranged and respectively guide the flange portion so that a part of the teeth is exposed between the upper and lower division bars. Each of the upper and lower division bars has a guide wall that guides an end surface of the flange portion which is opposite to the teeth. Each of the upper and lower division bars has a mount portion. The vehicle rear door further includes a motor unit bracket fixed to the mount portions of the upper and lower division bars and supporting a pinion that is engaged with the exposed teeth between the upper and lower division bars.