A transportation path changing device (1) of the invention is a transportation path changing device that changes a transportation path of a continuous sheet-like object (3) that is being transported. The device includes: an oscillating section (2) that oscillates in an intersecting direction Y intersecting with a flow direction X of the transported object, and that increases/decreases the length of the transportation path of the transported object (3); a first moving means (6) that is connected to the oscillating section (2), and that moves the oscillating section (2) in the intersecting direction Y; a second moving means (7) that moves a portion or the entirety of the first moving means (6) in the intersecting direction Y; and a control section (9) that controls the first moving means (6) and the second moving means (7).