A folding machine includes a conveyance roll configured to come into contact with both a first region and the second region being flush with each other a web guide mechanism configured to cause the first region and the second region to face each other with reference to the folding line so that an angle between the first region and the second region becomes smaller toward downstream a press mechanism configured to press at least any one of the first region and the second region. The press mechanism changes a pressing strength on the web to change at least either a track length (first track length) in which one side edge provided on a downstream of a conveyance roll is conveyed or a track length (second track length) in which other side edge is conveyed.
