A rigid-walled, block-shaped box is internally provided with a compartment arranged adjacent to a vertical wall of the box and having a first chamber with a first window open to the inside of the container and a second window open to the outside, and a second chamber with a third window open to the inside of the container and a fourth window open to the outside. An object of the present invention is to provide a folder type mobile phone with an increased life span thereof by preventing two housings from being shaken with respect to each other in a closed position where the two housings are folded on each other. The sheet-shaped base board 2 is a flexible base board capable of transmission and reception of the light and electric signals, in which a light guide 21 and conductor patterns 22 extended in an insertion direction 10, are formed.