Abstract: A pediatric arm restraint is disclosed for restricting movement of an infant's arm at the elbow. The restraint includes an inner foam pad and an outer stiff rigidifying plastic sheet, the foam pad preferably being the larger of these two components to extend beyond the edges of the plastic sheet for comfort to the infant. Both the pad and the sheet taper from a major edge to a minor edge to facilitate forming the restraint into a conical shape for use, with the major edge being adapted for placement in an infant's axilla and the minor edge fitting below the infant's elbow. The restraint is normally flat for ease in shipping and handling, but is easily bent into a generally tubular configuration, preferably a tubular-conical configuration, around an infant's arm and then secured in that position by Velcro strips.