To prevent powder bag bodies from falling, being deviated and being accumulated when they are transferred from a curve conveyor to a straight conveyor.

A sliding roller 10a having the small contact resistance to make power bag bodies D easily transferred to the straight conveyor B, and holding rollers 10b, 10c having the large contact resistance to reliably receive the powder bag bodies D are provided on a straight conveyor B side of a confluent part C between a curve conveyor A and the straight conveyor B.