Three inductors (first to third inductors (5 to 7)) with inductances L1 to L3 are disposed in an inverted F antenna which has four compact antenna elements (first to fourth antenna elements (1 to 4)), with element lengths shorter than the wavelengths of the desired resonance frequencies, grounded to a ground point (1), and power is fed to the inverted F antenna with a power feeding unit (10) via a matching circuit (9), thereby enabling multiple antenna operations including operations as a two-resonance loop antenna resonating at two resonance frequencies at the high-frequency side, an inverted F antenna resonating at two resonance frequencies at the low-frequency side, and an inverted L antenna. Further, if necessary, a capacitor (8) having a capacitance value of C1 is connected in parallel to the third inductor (7), for frequency adjustment. Provided, in such a way, is a multi-band antenna with which a plurality of resonances can be attained.