Abstract: For use on a bed mattress, a baby protector having a mounting sub-assembly and a baby holding sub-assembly. The mounting sub-assembly has a central portion adapted to overlie the mattress, and adjustable length straps extending from the central portion on opposite sides down to fasteners (preferably snap hooks) for attachment to the bed rail. The baby holding sub-assembly has a short fabric strap affixed at one end to the central portion of the mounting sub-assembly, a snap hook on the free end of this strap, and a self-contained fastener (preferably a safety pin) on this snap hook for attachment to the baby's diaper.