A support leg assistant for use with a support jack having a telescoping support leg comprises an elongated housing member having a first end attached to the stationary outer tube of the jack and a second end extending outwardly from the jack. Preferably, housing member is generally horizontal and the second end thereof is at or near the edge of a trailer supported by the jack. An elongated pin extends through the housing member with a first end passing through a portion of the support leg in the outer tubing to hold the leg in position and a second end extending outwardly of the housing member to a handle. A elongated member, such as a cable, wire or rope, interconnects a crank with the bottom of the support leg so that the operator may raise, lower and secure the leg without crawling, bending or reaching under the trailer.