An electronic device includes a bottom plate, a circuit board, and a securing assembly. The circuit board is located on the bottom plate. The securing assembly comprises a positioning member, a locking member, and a linking member. The positioning member is mounted to the bottom plate and located between the bottom plate and the circuit board. The locking member is locked to the positioning member, to secure the circuit board to the bottom plate. The linking member is located on the positioning member and connected to the circuit board and the bottom plate to electronically connect the circuit board to the bottom plate.