To provide the loop antenna circuit where the antenna effective gain is enhanced by utilizing effectively a space in a receiver so as to extend the aperture area.

The antenna circuit is connected in parallel with a reactance circuit 3 and has an inductive element 1 forming a closed loop with the reactance circuit 3. In this case, a parallel inductive element 2 whose both ends are connected to different positions of the inductive element 1 respectively is provided to the antenna circuit. Since the inductance of a resonance circuit is reduced, the resonance is easily taken without decreasing the antenna aperture area even against a high reception frequency.