Abstract: A railing guard is provided for alleviating previous deficiencies with crib protectants. The crib railing guard disclosed protects infants from injury and discomfort resulting from impact against and contact with side railing on baby cribs. Furthermore, the crib railing guard provides a self-supportive, comfortable enclosure for care of infants on surfaces with or without side railing. The crib railing guard is composed of a base, a cushiony wall and fasteners. The base is sized and shaped to correspond to an infant mattress. The base, when used in conjunction with an infant bed, is placed on top of the mattress support structure and beneath the mattress. The cushiony wall is connected to the perimeter of the base and projects upward. The lower portion of the cushiony wall is designed to compress when a mattress is placed on top of the base in order to fit the crib railing guard between the crib railing and the mattress.