To keep the height of a base at a low level even if the lifting stroke of a conveying base is increased by preventing the conveying base from being raised when the weight of an object to be conveyed is larger than that of the base.

This conveyor device comprises a first link 11 having an upper end 11A fixed to the conveying base 4, extending downward, and having a lower end 11B to which a first rolling body 21 rotating around a horizontal axis perpendicular to the traveling direction A of a carriage 2 is fitted, a second link 12 having one end 12A rotatably connected to the lower end 11B of the first link 11 at the lower position L, extending generally rearward, and having the other end 12B to which a second rolling body 22 rotating around the horizontal axis is fitted, a first cam rail CR1 for raising for pushing up the first rolling body 21 at the lower position L to raise the conveying base 4 to an intermediate height position M, a lock means for locking the second link 12 and the first link 11, a second cam rail CR2 for raising for pushing up the second rolling body 22 to raise the conveying base 4 to a high position H, and a lock releasing means for releasing the lock.