To provide an openable electronic device that is downsized and has increased durability to withstand opening and closing.

An electronic device 1 comprises: a first casing 2; a second casing 3; and a cable 4. The first casing 2 has a first circuit board 5. The second casing 3 has a second circuit board 6. The second casing 3 is openably connected to the first casing 2 through a hinge 7. The cable 4 connects the first circuit board 5 and the second circuit board 6 to each other. The hinge 7 has a first hinge case 8, a second hinge case 9, and a tubular body 10. The first hinge case 8 is fixed to the first casing 2. The second hinge case 9 is fixed to the second casing 3. The tubular body 10 connects the first hinge case 8 and the second hinge case 9 rotatably to each other. The tubular body 10 includes a magnetic steel material, and has a hole through which the cable 4 is passed.