PURPOSE: An optical PCB is provided to perform a long distance signal transmission by arranging an optical waveguide element, a pipe block or a fiber block at level. CONSTITUTION: An optical PCB comprises a base substrate having an insulating material(91), a copper film(92), and an optical via hole; an optical signal transmitting unit attached to the base substrate for transmitting an optical signal at level; and an optical signal connecting unit connected to the optical signal transmitting unit at level for transmitting the optical signal more than predetermined length.
