PURPOSE: To keep a transport table in a horizontal state in stable manner in a turning-back part of a transport passage, during the continuous transport.

CONSTITUTION: A turning-back guide device 19 is installed at the turning-back parts 17a and 17b of a transport passage, and the turning-back guide device 19 is constituted of the guide sprockets 18a and 18b for guiding the endless chains 11a and 11b and a rotary guiding arm 21 which synchronously revolves, and the revolution radius of the rotary guiding arm 21 is allowed to accord with the revolution radius of each transport roller 15a, 15b in the turning back of a transport table 14, and a roller fitting recessed place 22 is formed at the top edge of the rotary guiding arm 21. The installation pitch of the transport table 14 installed on the endless chains 11a and 11b is allowed to accord with the revolution standard pitch of the rotary guiding arm 21.