Abstract: A gun rack includes first and second laterally spaced, upright supporting members for wall attachment. A plurality of gun barrel support brackets are attached to the first support member, and a corresponding plurality of lockable firearm retaining structures are attached to the second support member. Each lockable firearm retaining structure includes a pivotable locking plate having a narrow, straight-sided passage extending inwardly from one side of the locking plate to a circular aperture whose diameter is greater than the passage width; and a rotatable locking plate retainer pin having a diameter corresponding to the diameter of the locking plate aperture and opposing grooves having bottoms forming a straight bar section having a width sufficient to accommodate the width of the narrow passage of the locking plate. Each locking plate retainer pin is rotatably attached to a reciprocally mounted bar within the second support member, and a "Chicago" type lock is attached to the bar.