Novel organic/inorganic heterostructures composed of phthalocyanato tin(IV) dichloride (SnCl2Pc) and cadmium selenide (CdSe) were fabricated by using of molecular beam deposition (MBD). By means of some structural analyses (XRD, TEM), the crystalline and multilayered structure of the deposited film was verified. Linear and nonlinear optical properties of the heterostructure were also measured, by which the third-order nonlinear optical susceptibility and two components of response time for the multilayers was estimated as 1.8×10−8esu, less than 80 fsec, and 5 psec, respectively. The processability and its good optical performance of this organic/inorganic heterostructure is exploring toward a new kind of optoelectronic switching material.