Disclosed is a high-definition imaging lens assembly that can reduce the length of an optical path. The high-definition imaging lens assembly includes: first, second, third, and fourth lenses that are sequentially disposed from an object along an optical axis, wherein the first lens has positive refractive power and the second lens has negative refractive power, the first and second lenses are made of optical glass, a front surface of the first lens and a rear surface of the second lens are spherical, and a rear surface of the first lens and a front surface of the second lens that are substantially planar are bonded to each other. The third and fourth lenses are made of plastic and are spaced each other and at least one surface of each of the third and fourth lenses is aspherical.