Abstract: An optical fiber splice device in which an optical fiber can be connected to a branch line side thereof as the need arises such as in the case where new subscribers join after a multiple optical fiber is connected to a trunk line side thereof. The device includes a plurality of glass capillary tubes, a body equipped with the plurality of glass capillary tubes in a middle portion thereof and a cover glass covering and protecting at least the region where the plurality of glass capillary tubes are provided. The ends of optical fibers of the trunk and branch lines are inserted in the glass capillary tubes to be spliced therein. The optical fiber ends has the coatings thereof removed. The body includes a mount portion in the middle thereof where the plurality of capillary tubes are provided in parallel, and first and second fixing portions on both sides of the mount portion for guiding and fixing the optical fibers to the glass capillary tubes.