There is provided an electrostatic surge prevention structure capable of improving resistance against electrostatic surge, reducing costs and processes, and saving spaces. A flexible printed circuit board 31 connected to a control printed circuit board contained in a front casing 22 is provided at a position corresponding to a gap 41, between the front casing 22 and a touch panel assembly 21, appearing in a display device 12, the flexible printed circuit board 31 has two layers of conductor parts 43 and 44, surfaces of these conductor parts 43 and 44 are covered with insulative coats 46 and 47, an exposed part 44A (or coating part 51 by plating as the exposed part) through which the conductor part 44 is externally exposed is formed at a portion opposing the gap 41 by peeling off the insulative coat 47, and the conductor part 44 having the exposed part 44A (or coating part 51) is grounded.