In this article,study of β-Laplace, β- Laplace-Carson,β- Natural transform of fractional order and some of properties of β- Laplace transform of fractional order mentioned.Further apply β- fractional order Laplace transform on Mittag- Leffler function, Riemann-Liouville integral and Caputo fractional derivatives. Also we obtain a β- inverse Laplace Transform of fractional order.