To improve an operation rate of a carrier device by dispensing with work such as to adjust guide width of a carrier conveyor each time even in the case when the width is different for a work by moving the center of gravity of the work to the side of a side surface guide arranged on a side part of the carrier conveyor.

This work carrier conveyor sequentially carries various kinds of works 14 different in dimensions by aligning them in a previously decided position by a carrier conveyor 20. In this case, it is constituted to move the center of gravity of the works 14 to the side of a side surface guide 30 arranged on a side part of the carrier conveyor 20 by inclining a carrier surface of the carrier conveyor 20 concerning its cross direction.