The present invention provides a web feeding method and a web feeding device used therein with which, in a roll-to-roll system, the position at which a web that is being fed passes is stabilized without any variation due to the feeding process and lot of the web. Specifically, in at least some of the sections through which a web (2) is fed, a width-direction center part of the web (2) is bent, soas to be the lowermost section thereof, by supporting the ends on both sides of the web (2), and then the web (2) is fed in this state. Such support is achieved by, for example, forming a through hole(2a) in each end of the web (2) on both sides thereof, and inserting a protrusion (12a) formed on the top surface at one end of an arm (12) into each through hole (2a) from the underside of the web (2).