[Problem] When caulking a caulking ring, there is a risk that a cylindrical part disposed on the inner side of the caulking ring may be pressed and damaged. To address this, provided is a novel structure which fixes a protective member of an optical fiber to a housing without performing caulking work. [Solution] A fixing member (20) of the present disclosure comprises: a base part (21) fixed to a housing of an optical connector; and a tubular part (22) into which the optical fiber can be inserted and which protrudes from the base part in the outside direction of the housing while the base part is fixed to the housing. The tubular part has, on the outer peripheral surface thereof, projections (23) which can be inserted into a mesh of a mesh-like protective tube (40) for protecting the optical fiber.
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