Abstract: A locking pin assembly for sliding members comprises a member having bifurcated portions insertable within a hole extending through the sliding members. The bifurcated portions are adapted to be cammed apart by a bar supported for slidable movement within the bifurcated portions thereby securely wedging the pin in the hole and locking the sliding members together. In one preferred embodiment, the bifurcated portions are supported in a sleeve and are joined to a handle portion extending through the other end of the sleeve. Actuation between a locked and unlocked position is effected by movement of the sleeve relative to the handle portion. In an alternative embodiment, the camming bar is omitted, and locking action is carried out instead by causing slidable movement of one wedging portion relative to another.