A conveying device drivable by rack gear has a towed hook further forward than a front end of a rack gear mounted to a conveying traveling body. A driving pinion gear, disposed at an entrance of a rack gear drive section, has a drawing-in claw that engages the towed hook and draws in the conveying traveling body to a position where the front end of the rack gear meshes with the driving pinion gear. The towed hook has, at a position at a rear side of a hook portion at a distal end thereof and further forward than the front end of the rack gear, an advance preventing claw portion disposed continuous thereto that, together with the hook portion, sandwiches the drawing-in claw, and the hook portion has a length such that it enters more deeply inside a rotation locus of the drawing-in claw than the advance preventing claw portion.