Abstract: An adjustable gun rack for a vehicle. Adjustable straps with buckles are used to be secured to a rigid structure within a vehicle. On the adjustment straps are hooks for mounting a detachable gun case. Usually, several hooks will be provided and several gun cases will be provided so that more than one long barrel firearm may be placed within each gun case and mounted on the adjustable straps. The straps will mount around upright seat backs with the gun cases hanging from the hooks on the straps. The straps could go around a seat bottom with the gun case hanging between the edge of the seat and the floorboard of the vehicle. The straps are flexible and adjustable so they can be configured to fit a variety of configurations in different vehicles. The individual gun case may be detached from the adjustable straps and used with a shoulder strap to transport a long barrel firearm inside the gun case away from the vehicle where the adjustable gun rack is mounted.