A bed rail for mounting to the side of a bed includes a pair of support legs and an entrapment-resistant side panel. The side panel includes a rigid frame enclosed within a flexible bed rail cover. The frame is generally rectangular in shape, having upper, intermediate, and lower horizontal rods, spanning first and second vertical shafts. The intermediate rod is preferably attached to the bed rail covering by means of a sheath, and located so as to restrain outward lateral excursions of said bed rail covering in the region between the lower and upper rods. The lowermost ends of the vertical shafts are pivotally connected to outer ends of the support legs. The support legs have inner ends installed between the mattress and the box spring. Anchor straps extend between the outer ends of the support legs and an anchor plate on the other side of the bed.