The present invention provides an improved method of producing a stable acid denatured soyurea adhesive having improved wet and dry strengths, with more efficient production and lower production costs. Cellular phone includes a first display portion at a surface of a first body opposed to a second body in the folded state, and includes a second display portion, an image taking portion and a plurality of operation portions arranged at a rear surface of the first body remote from the first display portion. As a result, there is increased the ray density of a light beam on the light-receiving surface. The hollow tubes are arranged so as to reduce a number of intersecting wall surfaces of the hollow tubes.