Provided is a camera module including a housing that is formed in a rectangular box shape and has a cylindrical barrel coupling portion extending upward from the central portion thereof; an image sensor module that is mounted in the housing; a lens barrel that has a lens insertion port provided in the central portion thereof and a housing coupling portion extending downward therefrom, the housing coupling portion being closely coupled to the barrel coupling portion of the housing; a wafer lens that is mounted in the lens insertion port of the lens barrel; and a lens fixing cap that is covered on the upper end portion of the lens barrel.