A protection panel having a touch input function of the analog resistance film method for detecting an X-Y coordinate representing an operated position by a potential gradient based on a touch operation relative to the front substrate 6, in which the back substrate 5 and the front substrate 6 include contacts 5G and 6G, respectively, connected to each other in series on the resistance films 5A and 6A through the routing circuits 5C and 6C to have potential difference, in which the contacts 5G and 6G face each other at a predetermined distance when the back substrate 5 and the front substrate 6 are connected to each other, and in which a switch 12 is provided for detecting, when voltage is applied by the contacts 5G and 6G between the electrodes 5D or 6D of either one of the front substrate 6 and the back substrate 5, whether or not the contacts 5G and 6G are brought into contact with each other based on voltage detected by the electrodes 5D or 6D of the other of the front substrate 6 and the back substrate 5.