To provide a manufacturing method for a conveyor belt capable of efficiently manufacturing the conveyor belt provided with an article to be detected by eliminating a loss time in a manufacturing line accompanying with intervention of manual work of a worker in the manufacturing line for manufacturing the conveyor belt by laminating a plurality of rubber belts.

In the manufacturing method for the conveyor belt provided with the belt monitoring article to be detected, a rubber magnet piece 13 (article to be detected) is mounted to a surface of any one or more of rubber belt of the plurality of rubber belts laminated for forming the conveyor belt, a rolled side rubber belt roll 21 with rubber magnet (rubber belt roll with article to be detected) is previously manufactured. In the manufacture line of the conveyor belt, the side rubber belt 20 with rubber magnet (rubber belt with article to be detected) paid out from the side rubber belt roll 21 with rubber magnet and the other rubber belt are superposed and vulcanized.