An optical interconnection apparatus which is very easy to handle and does not cause excessive bending and breakage of the optical fibers when connecting with other optical apparatus is provided. The optical interconnection apparatus includes a base sheet and plural optical fibers two-dimensionally routed on the base sheet via an adhesive layer. The optical fibers form a routing pattern having at least a straight part, a crossing part, a curved part or a fiber pitch changing part. The apparatus further includes another base sheet this is adhered on the said routed optical fibers. The two base sheets have a different sizes so that one of the base sheets does not exist in the vicinity of the edge of the other base sheet at which the optical fibers are outwardly extended.