OPTICAL FIBER ARRANGEMENT METHOD, OPTICAL FIBER FUSION SPLICING METHOD, METHOD FOR MANUFACTURING OPTICAL FIBER RIBBON WITH CONNECTOR, AND INTERMITTENTLY CONNECTED OPTICAL FIBER RIBBON

[Problem] In the work of making a holder hold multiple optical fibers detached and separated into single fibers, handling of the optical fibers is cumbersome and workability is poor. 5 [Solution] An optical fiber arrangement method according to the present disclosure includes: preparing an intermittently connected optical fiber ribbon including a plurality of optical fibers arranged side by side at a first pitch larger than a fiber diameter; reducing a width of the optical fiber ribbon in an 10 interior of a holder by making the holder hold a non-connecting region of the optical fiber ribbon; and arranging the plurality of optical fibers, extending out from the holder, at a second pitch smaller than the first pitch by removing connecting portions in a state where the holder is holding the plurality 15 of optical fibers, the connecting portions connecting the plurality of optical fibers extending out from the holder to each other.