Tow truck dolly

A dolly member for supporting a wheel of a towed vehicle comprising a rigid frame, a trough member supported by said frame for receiving a wheel of a towed vehicle, a pair of longitudinally aligned wheels pivotally mounted on one side of the frame, at least one beam transversely secured to said frame on the side opposite the wheels, a stirrup-shaped member rigidly secured sideways near the end of said beam. the open side of said stirrup-shaped member facing downwardly, whereby when a pair of said dolly members are disposed opposite one another and the beams are adjacent one another, the stirrup-shaped member is adapted to hook onto and firmly engage to the beam of the opposite dolly member so that the bottom side of said latter beam is the only one free for movement.