According to one embodiment, an electronic apparatus has a first housing having a first cover, a second housing having a second cover, and a hinge device. The hinge device connects rotationally the first housing and second housing, and has a hinge shaft, a first arm and a second arm. The first arm is covered by the first cover, and one end is connected to the hinge shaft, and the other end is fixed to the first housing. The second arm is covered by the second cover, and one end is connected to the hinge shaft, and the other end is fixed to the second housing. The first cover and second cover have opposed parts around the hinge shaft, and have a projection which is provided in one opposed part, and slidingly contacts the other opposed part.