Abstract: A pair of extensible leveling and stabilizing legs are connected pivotally to the underside of a trailer, the legs can be raised from their ground engaging position extending downward to the ground in an outward direction transverse to the longitudinal axis of the trailer, to a retracted position extending parallel to the underside of the trailer. Force means are provided which tend to move the legs toward each other and thus continuously maintain stabilizing and leveling contact of the ground engaging portion of the legs with the ground. The force means can also be used to maintain the legs in a raised and retracted position.