A data input apparatus can communicate with an imaging unit capturing an image of a subject to output image data, and includes a display unit displaying a screen including data input areas, and a processor. The processor includes: a setting portion setting data input to the data input area; an instruction position acquiring portion acquiring an instruction position based on a relative position between a display surface of the display unit and a recording medium included in image data output by the imaging unit; an information acquiring portion acquiring information stored in the recording medium based on the image data; and an input information acquiring portion acquiring input information available for input to the data input area among the acquired information. If the acquired instruction position is a prescribed position, the setting portion sets the acquired input information as the data input to the data input area.