To solve such a problem that a conventional worked timber reversing device is dangerous because a heavy worked timer B may be dropped by turning vibration, and complicated in constitution.

A first roller carrying device 1 carries worked timber into which work timber is processed with its lower face marked. A first horizontally moving device 4 is mounted thereto for moving a chain 4a to cut across the first roller carrying device 1 at a right angle. A protruded portion 4b is fixed to the chain 4a of the first horizontally moving device 4. A plurality of half-turn members 7 are fixed to a rotating shaft 6 supported to the side of the first roller carrying device 1 by a supporting member 5 in a spaced relation. On lower parts of the half-turn members 7, reversing and carrying devices 13 are mounted which are shaped in circular arcs slightly larger than the turning circular arc of the half-turn member 7. A belt 13c applied to pulleys 13a, 13b mounted at both ends of each reversing and carrying device 13 is driven by a third motor 14.