A protective panel having touch panel function is used for protecting a front surface of a display device that is disposed so as to be visually recognized from outside, and the protective panel is fitted in a panel fitting part of a casing provided with an opening such that an outer surface of the protective panel forms a flat plane identical with that of the casing with no gap formed therebetween. The protective panel includes: an upper electrode sheet having a decorative layer and upper electrodes provided thereon; and a lower electrode sheet having lower electrodes provided on an upper surface thereof, and the upper electrode sheet and the lower electrode sheet are disposed such that the respective electrodes thereof face with each other. On a lower surface of the upper electrode sheet, at a non-electrode part not provided with the upper electrodes, there is provided a height difference adjustment part that has a thickness substantially equal to each of those of the upper electrodes, and the height difference adjustment part is provided such that short circuit is prevented with the upper electrodes as well as with the lower electrodes.