Abstract: The purpose of the present study is to build the model to expectation of life (ex) associated with age for male of Bangladesh. For this, the expectation of life (ex) for male population of Bangladesh in the census years of 1974, 1981 and 1991 have been used in this study. A few mathematical models have been tried to fit to ex for male of Bangladesh and it is found that they follow polynomial models. The Cross Validity Prediction Power (CVPP) and F-test are also applied to these models to check the validity and significance of the models.