An apparatus for manufacturing an absorbent article includes a processing device that, processes semi-finished products, and an inspecting device that inspects whether an actual processing position by the processing device is within an allowable range of the process target position on the semi-finished product. The inspecting device includes, a sensor section located in the transport direction and outputting a detection signal while the actual processing position of the semi-finished product is being detected, a reference signal outputting section outputting a reference signal having a waveform in which one wavelength is equivalent to a unit transport amount corresponding to a single semi-finished product, the reference signal having a first waveform portion at a phase corresponding to the allowable range in the wavelength, and a determining section determining whether the actual processing position is within the allowable range by comparing the detection signal with the reference signal.
