To provide an information processor, a display control method, and a display control program for securing consistency between input devices while keeping versatility.

A printer 100, which has an application execution part 110 executing a print application program 122 for making predetermined information processing according to an operation instruction of a user, is provided with: a touch panel type display part 150; a keyboard 140 having a plurality of operation keys; and a display/input control part 130 acquiring information about the operation keys held by the keyboard 140 and information about the operation keys necessary for operation of the print application program 122 and making control for displaying an image representing the operation keys, which are not provided in the keyboard 140 of the operation keys necessary for operation of the print application program 122, on the display part 150 based on the acquired information.