<p>Disclosed is an optical wiring board which enables to deal with a larger amount of information to be processed and a higher speed of information processing. Specifically disclosed is an optical wiring board integrally comprising a rigid section wherein a conductor circuit and an insulating layer are formed on both sides of a substrate and one or more bendable flex sections. Such an optical wiring board is characterized in that the rigid section is provided with an external connection terminal for mounting an optical device and/or a package substrate mounted with an optical device, and at least one of the flex sections is provided with an optical wiring.</p>
