A liquid crystal display (LCD) is fixed to an upper housing half by an LCD fixing frame made of a material having a high thermal conductivity. The LCD fixing frame is attached to the upper housing half in contact with a lower surface of the LCD on the opposite side of a display panel which defines an image display plane. A substrate mounted with high heat generating parts such as a CPU is attached to the LCD fixing frame such that the high heat generating parts face the lower surface of the LCD fixing frame. A thermally conductive member is disposed between the high heat generating parts and the LCD fixing frame in contact with the high heat generating parts and LCD fixing frame.