A portable terminal suppresses reduction of antenna sensitivity. A portable telephone includes an actuating side casing, display side casing, open-close sensor, circuit disposed on the actuating side casing and includes a ground part, power supply part and signal processing part, first conducting part disposed on the actuating side casing and connected to the ground part, second conducting part disposed on the display side casing and connected to the power supply part, antenna element, receiver disposed opposite the antenna element when the telephone is closed, switching part.