A lens barrel of a camera module is provided to improve the manufacturing efficiency of the lens barrel by fixing a lens into a barrel using thermal fusing. A lens barrel of a camera module includes a barrel(110) and a fusing rib(120). The barrel includes a rib forming portion, which is formed on an external surface of an open lower portion of the barrel. An exposure hole penetrates through an upper enclosed surface of the barrel. At least one lens is arranged on the barrel. The fusing rib is arranged on the rib forming portion. The fusing rib is thermally transformed toward the lens by an external heat source and fused on a planar portion of the lens. A iris diaphragm(115) is arranged between adjacent lenses. A spacer maintains a constant spacing between the adjacent lenses.
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