Abstract: An optical fiber splicing device (20) includes a glass cylindrically shaped capillary tube member (24) having a passageway formed therethrough eccentrically of the longitudinal axis of the capillary tube member. The capillary tube member is provided with a slot (86) such that a portion of the passageway in the form of a groove (88) extends across a planar surface (87) formed by the slot. The capillary tube member is mounted in a housing (22) which is made of a material and formed to provide a lens opposite to the slot to facilitate visual inspection of ends of end portions of two optical fibers which are positioned in the groove. A spring clamp (26) is mounted to the housing in a first position spaced from the planar surface to allow insertion of fiber end portions into the groove.