An electronic device comprises a terminal, an armature which can contact the terminal, a knob member which moves between a first position and a second position, sliding the armature on the terminal, a first energizing member which energizes the knob member in the direction of the first position, a rotation operation member which can move the knob member and can rotate between a third position corresponding to the first position and a fourth position corresponding to the second position, and a second energizing member which energizes the rotation operation member in the direction of the third position when the rotation operation member rotates from the third position.