The present invention is an improved rear view mirror that removably attaches to a protective helmet. The helmet mirror, in its preferred embodiment, includes a bracket, an elongated adjustable arm, an adjustment nut, and a mirror, wherein the bracket and the adjustable arm are rubber-coated. The adjustable arm includes a first end and a second end, wherein the first end is attached to the bracket and the second end is attached to the mirror by means of the adjustment nut. The positioning of the mirror may be adjusted by bending the adjustable arm and/or pivoting the mirror about the adjustment nut. The bracket is bent to form a general J-shape when viewed from the side. The bracket is adapted to be wedged under the rim portion of a protective helmet to removably secure the device to the same.