A light-emitting module (10a, 10b), comprising: (i) a light-emitting device having a light-emitting end surface from which light is emitted; (ii) an optical fiber including: a core part extending along a light-guide direction in which light is guided; and a cladding part extending along the light-guide direction and covering the core part, the cladding part having a refractive index lower than that of the core part, the optical fiber having a covered fiber section and a bare fiber section, the covered fiber section including a covering part extending along the light-guide direction and covering the cladding part, the bare fiber section having a light-receiving end (17e, 17f) into which the light enters, the bare fiber section being not covered with the covering part; and (iii) a housing in which the light-emitting device is provided, wherein the optical fiber is a multi-mode fiber; the housing includes a fixing part (11 a, 14, 16a through 16c) for fixing a portion of the bare fiber section such that the light-emitting end surface of the light-emitting device and the light-receiving end (17e, 17f) of the bare fiber section face each other; and the fixing part (11a, 14, 16a through 16c) fixes the portion of the bare fiber section by a resin material having a refractive index lower than that of the cladding part in the bare fiber section, the light-emitting module (10a, 10b) being characterized in that: the covered fiber section of the optical fiber includes (i) a primary covering layer extending along the light-guide direction and covering the cladding part and (ii) a secondary covering layer extending along the light-guide direction and covering the primary covering layer; and the primary covering layer has a refractive index lower than that of the cladding part in the bare fiber section. (i) a light-emitting device having a light-emitting end surface from which light is emitted; (ii) an optical fiber including: a core part extending along a light-guide direction in which light is guided; and a cladding part extending along the light-guide direction and covering the core part, the cladding part having a refractive index lower than that of the core part, the optical fiber having a covered fiber section and a bare fiber section, the covered fiber section including a covering part extending along the light-guide direction and covering the cladding part, the bare fiber section having a light-receiving end (17e, 17f) into which the light enters, the bare fiber section being not covered with the covering part; and a core part extending along a light-guide direction in which light is guided; and a cladding part extending along the light-guide direction and covering the core part, the cladding part having a refractive index lower than that of the core part, the optical fiber having a covered fiber section and a bare fiber section, the covered fiber section including a covering part extending along the light-guide direction and covering the cladding part, the bare fiber section having a light-receiving end (17e, 17f) into which the light enters, the bare fiber section being not covered with the covering part; and (iii) a housing in which the light-emitting device is provided, wherein the optical fiber is a multi-mode fiber; the housing includes a fixing part (11 a, 14, 16a through 16c) for fixing a portion of the bare fiber section such that the light-emitting end surface of the light-emitting device and the light-receiving end (17e, 17f) of the bare fiber section face each other; and the fixing part (11a, 14, 16a through 16c) fixes the portion of the bare fiber section by a resin material having a refractive index lower than that of the cladding part in the bare fiber section, the light-emitting module (10a, 10b) being characterized in that: the covered fiber section of the optical fiber includes (i) a primary covering layer extending along the light-guide direction and covering the cladding part and (ii) a secondary covering layer extending along the light-guide direction and covering the primary covering layer; and the primary covering layer has a refractive index lower than that of the cladding part in the bare fiber section. the covered fiber section of the optical fiber includes (i) a primary covering layer extending along the light-guide direction and covering the cladding part and (ii) a secondary covering layer extending along the light-guide direction and covering the primary covering layer; and the primary covering layer has a refractive index lower than that of the cladding part in the bare fiber section.