Abstract: This mattress hanger assembly provides an adjusting assembly for raising and lowering a mattress support. The assembly includes a bracket having a plurality of openings each representing a different position to which the support can be raised or lowered. A hanger carried by the support is received in one of these openings and a lock member secures the hanger in a selected opening to prevent the hanger from slipping out of the opening and placing the mattress in an unstable condition. The crib can include a drop rail having a track and slide system to facilitate access to the adjusting assembly.