The Monte Carlo Method is widely used to obtain the value of the options which is expectation of function of normally distributed random variable. To reduce the variance of samples, Antithetic Variates is used. However Antithetic Variates does not work for the even function and the function which is close to the even function. In this paper, Modified Antithetic Variates is introduced to compansate the defect of the Antithetic Variates.