To provide an information processor using a flexible printed board, with suppressed radiation noise from a signal line without deteriorating bending property when opening and closing a display part.

A first cover film CV1 is formed to cover a wiring layer WL1 of a first surface of a base film BF, and a second cover film CV2 is formed to cover a wiring layer WL2 of a second surface of the base film BF. The second cover film CV2 and the wiring layer WL2 of the second surface of the lower layer thereof in a loop forming area A-B are discontinuously removed along the bending direction of a loop, and the base film BF is exposed in the removed part. The wiring layer WL2 located on the lower layer of the cover film CV2 left without being removed and the wiring layer WL1 located on the first layer of the base film BF are electrically connected with each other through a through-hole TH extending through the base film BF.