Provided is a medium process apparatus. The medium process apparatus comprises a support device configured to support a medium that is being transferred, and a plurality of detecting units configured to detect a state of the medium. The plurality of detecting units are arranged at regular intervals, and each of the plurality of detecting units comprises a detecting lever and a detecting sensor configured to output a signal according to a movement of the detecting lever. If the medium is divided into uniform regions arranged in a direction perpendicular to a transfer direction of the medium, the detecting units detect states of corresponding regions of the medium.