Abstract: A firearm holster, having the outward appearance of a billfold or wallet of the bifold-type, substantially conceals and disguises a pistol that can be fired from within the holster via a trigger finger receiving aperture in at least one side thereof. The holster includes a support block with restraining straps for maintaining the pistol at a proper firing position within the holster. Snap-type fasteners secure portions of the holster to each other to preclude its inadvertent opening. The holstered pistol can be carried in an inconspicuous manner for ready use in a clothes pocket of undercover police personnel or the like.