A radio apparatus having a casing and an antenna is provided. The casing has first, second and third faces. The second face and the third face correspond to a side face and another side face of the first face, respectively. The antenna is formed by a conductive line in such a way that the conductive line forms a first loop shape, a second loop shape and a third loop shape, that the first loop shape includes a first portion and a second portion positioned adjacent to a third portion of the second loop shape and a fourth portion of the third loop shape, respectively, that directions of currents distributed on the first portion and the third portion if the antenna is fed are almost same, and that directions of currents distributed on the second portion and the fourth portion if the antenna is fed are almost same.