PURPOSE: To enable continuous processing by dividing a conveying passage having the long processing time into a plurality of parallel passages and setting the conveying speed to a value obtained by dividing the conveying speed in a device by the number of passages, in a device for performing a plurality of processing for a printed circuit board.

CONSTITUTION: A processing stage 10 requiring the long time in performing of processing and conveying through processing lines 9 to 11 at a speed V is divided into two or more parallel conveying passages 10.1, 10.2.... The conveying speed v1 of the conveying passages 10.1, 10.2... is set to a value obtained by dividing the conveying speed V of the conveying passages 9, 11 by the number (2 in an example in the figure) of a plurality of passages 10. The conveying passages 10.1, 10.2... and the conveying passages 9, 11 are connected by point units 19, 20. By this structure, continuous processing can be performed.