Herein disclosed is a portable wireless device, comprising: a first case 11 having a metal portion; a second case 12; a hinge portion 13 operative to rotatably connect the first case with the second case; a circuit board 18 having a ground pattern, the circuit board accommodated in the second case; and a feed portion connected to the circuit board, the hinge portion 13 having a rotating shaft 23 formed by a conductive metal, and the first case, the rotating shaft 23 and the ground pattern collectively function as an antenna element, wherein the portable wireless device further comprises a first conductor element 25 accommodated in the first case 11 in spaced-apart relationship with the rotating shaft 23 with a predetermined gap, the first conductor element having an electrical length substantially equal to a half wavelength of a wireless frequency.