To provide an operating device for an electronic apparatus having a turn knob that utilizes a pattern of a printed board and is capable of soldering all components to be mounted on the printed board by reflow mounting, onto the printed board at the same time.

The operating device for an electronic apparatus having a turn knob comprises an operation part 1 having a hollow part and operable by the turn knob 2. The operation part 1 is mounted on the printed board 5. An electronic component 3 is placed within the hollow part and mounted on the printed board 5. The printed board 5 is provided with holes 5a, 5b located on both sides of the electronic component 3 within the hollow part.