Foldable mobile terminal device

The present provides a mobile terminal device includes first and second housings foldably coupled to each other by a hinge portion, and the first housing can turn in the direction orthogonal to the unfolding/folding direction. The mobile terminal device also includes a first camera provided for a surface opposed to said second housing in a state that the device is folded, and a second camera provided for a surface of the first or second housing on the opposite side to the surface having the first camera, when the two housings are unfolded at an angle of about 90° and the first housing turns at an angle of about 90° to the second housing, and a sensor for detecting a positional relation between the two housings according to a change of the angle between the two housings. According to the detected position, operations of the first and second camera are stopped/started.