PURPOSE: To utilize effectively the mount space by connecting plural printed circuit boards with a flexible wiring board along both side ridges opposite to each other and mounting an antenna along the inside of a curved part of the wiring board.

CONSTITUTION: Two printed circuit boards 1a, 1b are printed circuit boards made of a hard material and they are arranged so that mounted sides of circuit components 2 are opposite to each other. A flexible printed circuit board 3 is mounted along ridges of the hard printed circuit boards made of a hard material while being curved, both ends of the flexible printed circuit board 3 are connected respectively to the ridges of the printed circuit boards 1a, 1b opposite to each other, then the electric connection of both the printed circuit boards 1a, 1b is attained. In this case, the printed circuit board 3 is wired in nearly a semi-circle and then the flexible printed circuit board 3 forms a semi- cylindrical space. Then an antenna 4 is contained in the semi-cylindrical space.