Cadmium causes lung cell proliferation. We evaluated the effect of cadmium on the lung cell count in normal and treated mice. The normal and treated mice were given pyrogen free saline water and different dose of Cadmium (2.5 mg, 5 mg, 10 mg, 20 mg, 40 mg and 80 mg/Kg body weight) respectively for two months. Cell count gradually increased in low dose of CdCl2 (2.5, 5 mg/Kg body weight), but beyond that (10 mg, 20 mg, 40 mg and 80 mg/Kg body weight) cell death occurred. Data is representative of three independent experiments (p < 0.05).