Abstract: A hinge device that makes a second housing openable and closeable with respect to a first housing in an electronic device with the first housing and the second housing, includes: a shaft connected to the first housing; a lever having an end into which the shaft is inserted, the end that is rotatable around an axis of the shaft, and another end connected to the second housing; a friction plate that is situated next to the lever, the friction plate into which the shaft is inserted, the friction plate that is not rotatable around the axis of the shaft; and a pressing section that presses the friction plate in a direction of the lever along the axis of the shaft, wherein contact faces of the lever and the friction plate are formed to have a conical shape.