An input device configured for enhancing the image formed on the vehicle may include a body; a light emitter provided on an upper side of the body; a light receiver provided at the upper side of the body to be spaced from the light emitter and configured to receive light irradiated from the light emitter to operate; a dial knob supported by the body and rotatable around a rotation axis of the dial knob in a response to a user's manipulation; a protruding portion protruding from a bottom portion of the dial knob between the light emitter and the light receiver to selectively transmit the light irradiated from the light emitter toward the light receiver according to a rotation of the dial knob; a motor connected to the dial knob and configured to rotate the dial knob; and a controller configured to control the motor based on whether the light receiver is operated.