A mobile phone apparatus has a first case, a second case and a third case each taking the shape of a planar rectangle. A long side of the second case is longer than a long side of the first case, and whereby, in a closed position of the first case, a top surface of the second case is divided into a covered portion and an exposed portion. Also, on a top surface of the first case, a display is provided. Moreover, on the top surface of the second case, a QWERTY keyboard is provided at the covered portion, and a touch key including a cross key being the pointing device is provided at the exposed portion. Then, on a top surface of the third case, a numeric keypad is provided so as to be exposed in response to a sliding of the third case.