The invention concerns an integrated-structure device for transmitting optical waves comprising a plurality of optical microguides (11), a plurality of notches (12) with coupling surfaces through which respectively emerge said optical microguides; optical fibers whereof the end parts are respectively arranged and fixed in said notches so as to optically couple the end surfaces of said optical fibers and said coupling surfaces of said optical microguides; said coupling surfaces (7) of said notches (4) extend perpendicular to said integrating planes and are slanting relative to the longitudinal direction of the end part (5) of the optical fiber (6) and/or of said optical micro-guide (3) and are aligned; said end surfaces (8) of said optical fibers (6) extend parallel to said coupling surfaces (7) of said notches (4) and are aligned.