The energy bands of CdTe are studied using the method of Orthogonalized Linear Com-bination of Atomic Orbitals (OLCAO). The risults are in good agreement with that given by methods of LAPW, LMTO-ASA and NL-EPM. Some physical quantities related to the optical properties of CdTe are also described. These are the imaginary component of optical dielec-tric function ∈2(ω), and that of high frequency conductivity σ1(ω), and the optical reflectivity R(∈)