A portable terminal has one casing with a display unit and a speaker coupled to another casing with an operation unit and a microphone. The casings connect via a coupling unit and are capable of opening or closing by means of the coupling unit. The face of the casing with the speaker is directed in the same direction as the face of the casing with the microphone. The coupling unit enables one casing to be inclined to the other casing and to rotate around an axis substantially perpendicular to the face of the other casing with a microphone. Opening the casings increases the sound collecting rate of the microphone during a phone call and prevents a top face of the operation unit from being rubbed or scratched by the other.