An operating device includes a dial member that has a first engaging portion provided on a peripheral portion thereof, a rotated body that has a hollow portion at a center portion thereof and a second engaging portion which is engaged with the first engaging portion of the dial member, the second engaging portion being provided on a peripheral portion of the rotated body, and an electric equipment member that is inserted into the hollow portion of the rotated body. A rotation of the dial member is transmitted to the rotated body through an engagement of the first engaging portion and the second engaging portion.