The invention relates to an armrest subassembly for a motor vehicle which is designed and provided for arrangement on the interior side of a motor vehicle body. The armrest subassembly comprising an armrest, an adjusting device, a locking device and armrest-side locking means of the locking device. According to the invention, the armrest-side locking means are coupled to the armrest in such a manner that the locking means can be brought into engagement with and can be disengaged from the locking mechanism by a movement of the armrest with a component perpendicular to the adjustment path.