PURPOSE: To assure prevention of such troubles as disorder of stacked packages, any status that does not allow conveyance, and contact between works, by correcting conveyance attitude of the work into a regular attitude and stopping the work at its regular working point in each working zone.

CONSTITUTION: When works W are fed sequentially to plural working zones by means of roller conveyance, the works are stopped by a stopping means (stopper 18) at predetermined points of respective working zones mentioned above. After the works are stopped by the stopper 18, the works pushed by an attitude correcting means (push rod 19) in the direction perpendicular to the conveyance direction so as to correct the conveyance attitude of the works.