To provide a conveying apparatus having a large carrying width for carrying large-sized works, in which the flatness of the carrying surface is maintained, easily electrically controllable, and operable even in a clean room with no dusting.

Constant velocity motion intervals are overlapped with each other by using two sets of carrying beams for walking beam operation to eliminate the friction thereof on a work and the vertical movement of the work. Additionally, the conveying apparatus are arranged in multiple rows to increase the carrying width. The conveying apparatuses are driven by a rotating prime mover via. mechanical elements for carrying heavy objects. Consequently, since the carrying flat surface can be accurately maintained, the conveyor can be easily electrically controlled.