Optimization or the aerodynamic configuration or a space vehicle 'HOPE' (H-2 Orbiting Plane) is conducted by using several numerical simulation codes in the transonic and hypersonic speed ranges. Design requirements are set on the longitudinal aerodynamic characteristics in the transonic speed and the aerodynamic heat characteristics in the hypersonic speed. This paper describes the procedure or the optimization or aerodynamic configurations by using the numerical simulation technique as an effective design tool. Analysis shows the good aerodynamic characteristics or the final configuration and hence validity of the present optimization.