A portable terminal with a pair of housings is provided, in which a fixed member has a through hole and is fixed to one surface of a first housing, the through hole penetrating both surfaces of the fixed member, a rotation member is fixed to one surface of a second housing, facing one surface of the fixed member, a driving member is rotatably engaged with the through hole on the other surface of the fixed member and fixed to the rotation member, and an elastic member has one end supported by the fixed member and the other end supported by the driving member, for providing a driving force to rotate the driving member. The second housing covering the first housing or moving to a position where the second housing is in parallel with the first housing by rotating along with the rotation member and the driving member around a hinge axis extended vertically with respect to the first housing by the driving force of the elastic member.