Touch panel device

A touch panel device included in an onboard display, the touch panel device comprising:

• an advance key including an indication part on which corresponding functions is indicated and advances a screen displayed on the onboard display to another screen, and a touch detection area provided over the indication part of the advance key, the touch panel device recognizing an operation instruction in the touch detection area when the touch detection area is touched,
• wherein the advance key is provided in at least one of a left end and a right end of the screen, and the touch detection area is larger than the indication part, and
• wherein in a case the advance key is provided at the left end of the screen, the touch detection area is extended toward a center of the screen by a distance greater than a distance extended toward the left end of the screen, and, in a case the advance key is provided at the right end of the screen, the touch detection area is extended toward the center of the screen by a distance greater than a distance extended toward the right end of the screen, such that a center of the indication part is offset from a center of the touch detection area in a width direction.