According to one embodiment, an electronic device includes a first housing, a second housing, a third housing and a first movable member. The first housing includes a first opening through which the electronic device is capable of being coupled to an external coupling apparatus. The second housing is rotatably connected to the first housing. The third housing is removably attached to the second housing. The first movable member is across the first housing and the second housing, movable between a first position at which the third housing is locked to the second housing and a second position at which the third housing is capable of being unlocked from the second housing, and is configured to be restricted from moving from the first position to the second position when the electronic device is coupled through the first opening.