BULB

PROBLEM TO BE SOLVED: To provide a bulb capable of enhancing jointing precision between a body on which a light source is fixed and a blow-molded globe retained on the body covering the light source.SOLUTION: The bulb 1 is provided with a blow-molded globe 31, a body 2, and a light source 11. The globe 31 covering the light source 11 includes a globe main part 32 and an open peripheral part 33 which demarcates an opening 32a having a smaller diameter than the maximum diameter of the main part and is integrally connected to the globe main part 32. The angle made by the opening peripheral part 33 and an opening side portion 32b of the globe main part 32 continuing to the peripheral part in curvature shall be an obtuse angle. The body 2 includes a jointing cylindrical part 4 engaged on an outer side of the opening peripheral part 33 and light source fixing part 7 facing the opening 32a of the globe 31 and the light source 11 is fixed on the light source fixing part 7. A top end face 4a of the jointing cylindrical part 4 is formed so as to go along an outer face of the opening side portion 32b, and the top end face 4a is made to contact with the outer face of the opening side port 32b to retain the globe 31 on the body 2.