To provide a switch button device attaining compactification at the surface parallel to an attachment object surface.

A switch substrate 4 with a switch circuit 4a formed thereon, and a main substrate 5 with a main circuit or the like formed thereon, electrically connected to the switch substrate 4, and molded larger than the switch substrate 4, are separately molded. The switch substrate 4 is attached on a rear case 2 such that it is substantially parallel to a wall surface whereas the main substrate 5 is attached on the rear case 2 such that it runs substantially crosswise with the wall surface.