An adjustable rear view mirror includes a mounting seat, and a connecting unit including a rotating seat that is rotatably connected to the mounting seat by a first adjusting member on which a first washer is sleeved, and that has a supporting wall unit. A supporting rod has a pivot end pivotably connected to the supporting wall unit by a second adjusting member on which a second washer is sleeved, and an opposite supporting end connected to a rear view mirror body. The first and second washers are coated with PTFE coatings for reducing resistance to rotation of the rotating seat relative to the mounting seat and rotation of the supporting rod relative to the supporting wall unit.