An optical module, and more particularly, an optical module aiming system which may individually aim a position of each module, by configuring an optical module in charge of a cut-off area, that is, forming a hot zone, in which an outer lens, a primary optical system, and other parts are aimed together to thus enable adjustment aiming of a hot zone where the most regulations are concentrated, and configuring an optical module forming a wide zone or high beam so that a vertical position of a shield may be adjusted from the outside using a leaf spring and a push bolt.