A method for manufacturing an optical fiber, the method comprising: a step of exposing a glass fiber by stripping a fiber coating layer at an end portion, on a splicing side, of each of a pair of optical fibers; a step of fusion-splicing end surfaces of the glass fibers; and a step of recoating a protective resin on a periphery of exposed portions of the glass fibers, wherein the fiber coating layer includes a primary resin layer on an inner peripheral side and a secondary resin layer on an outer peripheral side and having a Young's modulus of 800 MPa or greater, and wherein the step of recoating is a step of coating the protective resin to include a coating edge, characterized in that: the primary resin layer has a Young's modulus of 0.5 MPa or less, the step of exposing is a step of forming a shape of the coating edge of the fiber coating layer which includes the primary resin layer and the secondary resin layer into a tapered shape which becomes narrower toward the end portion side, the method further comprising a step of irradiating a portion of the fiber coating layer to be stripped with ultraviolet rays to increase the Young's modulus of the primary resin layer, prior to the step of exposing, and wherein the step of exposing is a step of forming the coating edge of the fiber coating layer into the tapered shape. a step of exposing a glass fiber by stripping a fiber coating layer at an end portion, on a splicing side, of each of a pair of optical fibers; a step of fusion-splicing end surfaces of the glass fibers; and a step of recoating a protective resin on a periphery of exposed portions of the glass fibers, wherein the fiber coating layer includes a primary resin layer on an inner peripheral side and a secondary resin layer on an outer peripheral side and having a Young's modulus of 800 MPa or greater, and wherein the step of recoating is a step of coating the protective resin to include a coating edge, characterized in that: the primary resin layer has a Young's modulus of 0.5 MPa or less, the step of exposing is a step of forming a shape of the coating edge of the fiber coating layer which includes the primary resin layer and the secondary resin layer into a tapered shape which becomes narrower toward the end portion side, the method further comprising a step of irradiating a portion of the fiber coating layer to be stripped with ultraviolet rays to increase the Young's modulus of the primary resin layer, prior to the step of exposing, and wherein the step of exposing is a step of forming the coating edge of the fiber coating layer into the tapered shape. the primary resin layer has a Young's modulus of 0.5 MPa or less, the step of exposing is a step of forming a shape of the coating edge of the fiber coating layer which includes the primary resin layer and the secondary resin layer into a tapered shape which becomes narrower toward the end portion side, the method further comprising a step of irradiating a portion of the fiber coating layer to be stripped with ultraviolet rays to increase the Young's modulus of the primary resin layer, prior to the step of exposing, and wherein the step of exposing is a step of forming the coating edge of the fiber coating layer into the tapered shape.