Non-contact communication device, control method and program

An IC card (500) of the present invention comprises: a coil antenna (501) that receives power from a transmission/reception device via non-contact communication; a resonance frequency variable circuit (502) for varying a resonance frequency of the coil antenna (501); a rectification unit (505) that rectifies an antenna output current output from the coil antenna (501); a control unit (508) that consumes a load current; a detection unit (507) that detects an excessive current which is a difference between the load current and a rectified output current output from the rectification unit (505); and a resonance frequency control unit (509) that changes the resonance frequency of the coil antenna (501) by controlling the resonance frequency variable circuit (502) in accordance with a detection signal which indicates a detection result of the excessive current and which is output from the detection unit (507).