Abstract: A switch device includes an operating knob to receive an operation for a device to be controlled, a first detection electrode portion that is attached to the operating knob and detects a first operation position on the operating knob based on capacitance, a second detection electrode portion that is attached to the operating knob at a distance from the first detection electrode portion and detects a second operation position on the operating knob based on capacitance, a control unit to control the device to be controlled in accordance with the operation position detected by the first detection electrode portion and the second detection electrode portion, and a water droplet adhesion suppressing portion to suppress water droplet adhesion between the first detection electrode portion and the second detection electrode portion.

Abstract: At least a part of a movable switch is placed on a detection surface that is capable of detecting a variation in electrostatic capacitance caused by an approach or contact of a user's finger. A knob is configured to be displaced relative to the detection surface in accordance with an operation of the finger. A first conductive portion is arranged at a position in the knob where is separated from the detection surface. A plurality of second conductive portions are arranged at positions in the knob where are closer to the detection surface than the first conductive portion. A conductive path electrically connects the first conductive portion and the second conductive portions.