An information device includes a touch-sensitive panel that is used for display and operation; an operation check portion configured to check whether operation performed on the information device is first operation that is predefined operation or second operation other than the first operation; and a luminance setting portion configured to, when a luminance set value of the touch-sensitive panel is set at a low luminance value that is set for a case of power saving, and when the operation check portion checks that the operation performed on the information device is the first operation, remain the luminance set value unchanged, and, when the luminance set value is set at the low luminance value, and when the operation check portion checks that the operation performed on the information device is the second operation, set, as the luminance set value, a high luminance value greater than the low luminance value.