To prevent a work W from being unreasonbly loaded by moving bodies 4 in both sides even when positions thereof are relatively shifted longitudinal-directionally in a conveyer wherein the paired moving bodies 4 moving along the passage are arranged in the both sides a work conveying passage to convey the work W in the condition where respective side parts of the work W are supported by work supporting members 9, 10 provided in the each moving body 4.

A positional shift to a front side of the work W with respect to the work supporting members 9, 10 is blocked by a stopper 9e, while a positional shift to a rear side of the work W is allowed with respect to the members 9, 10.