A portable wireless device which effectively uses a space in a case while maintaining communication qualities by reducing antenna gain deterioration even when a plurality of antennas of different frequency bands are arranged adjacent to each other. The portable wireless device is provided with patterns for adding a band disturbing element, which is composed of beads and a parallel resonance circuit, to a part where one side of an antenna pattern of a magnetic field antenna is closed to between the main antenna and the magnetic field antenna is more easily generated. The band disturbing element may be composed of ferrite core or the like.