Abstract: Apparatus for accurately and automatically aligning a pair of optical fibers in abutting end-to-end relationship. The apparatus includes an optical fiber holder having an opening in substantially the exact center of one end thereof for supporting the end of an optical fiber therein. The holder comprises a one-piece, cylindrical-shaped housing having integral centering elements around the periphery thereof. The centering elements cooperate with the wall of a bore in a connector member within which the holder is adapted to be inserted to automatically center the housing within the bore, and hence, to automatically align the end of the optical fiber with the bore axis.When a second, similarly constructed holder supporting the end of a second optical fiber is also inserted into the bore of the connector member with their respective one ends in abutting end-to-end relationship, the ends of the two optical fibers will automatically be aligned with the bore axis and, hence, with each other.