A switch apparatus includes first, second, third, and fourth movable contacts held by a slider and sliding on a circuit board in conjunction with the rotational operation of an operation knob, and a belt-like common fixed contact, an auto fixed contact, a down fixed contact, and an up fixed contact provided on the circuit board. The auto fixed contact, down fixed contact, and up fixed contact are distributed on a straight line parallel to the common fixed contact. The third and fourth movable contacts are normally in sliding contact with the common fixed contact.