Abstract: An electronic device includes a case, an electronic assembly, a rotary member and a positioning module. The case includes a bottom plate and a side plate. The electronic assembly includes a circuit board and an electronic component. The electronic component is fastened to the circuit board. The circuit board is disposed on the bottom plate. The rotary member is disposed through the side plate and an assembling hole of the electronic component in sequence. The positioning module is fastened to the bottom plate, and the positioning module is disposed through the circuit board of the electronic assembly. The positioning module has a blocking surface facing the bottom plate. A part of the circuit board is located between the blocking surface and the bottom plate, and a distance between the blocking surface and the bottom plate is larger than a thickness of the circuit board.