A switch unit has a display part configured to display an image, and an operation part provided on the display part in a stacked manner. The operation part includes a button made of a transparent material except for an edge, a transparent button case having an opening formed in a position corresponding to a display region of the display part and configured to position the button, and a transparent substrate provided below the button case and having an electronic component disposed in a position corresponding to the edge of the button. The button is disposed on the transparent substrate via the opening in the button case. A discharge gap in parallel with the electronic component is provided on a wire in a position corresponding to the edge of the button on the transparent substrate.