Abstract: Discloses a safety bed sheet for use in preventing a child or elderly person from falling out of bed or from kicking off the covering blanket while sleeping. The safety bed sheet is in the form of a fitted bottom sheet and a superposed top sheet that is the same width as the bottom sheet's upper surface but cut-off both on the foot end and the head end, and, hence is shorter in length than the bottom sheet. The top and bottom sheets are stitched together along one of their common, longitudinal marginal edges, and stitched together a substantial distance along the other of their common, longitudinal marginal edges with a remaining unstitched-together portion having a separable fastening device.