A decoupling motion controller based on momentum is presented in this paper. Firstly, force control based on momentum is described. This controller does not have any singular points and is able to be applied to dynamic state. Moreover, inertial force which has been treated as disturbance such as centrifugal and Coriolis force is modeled with this method. Then, position and force vector is united in work space using equivalent mass matrix. After that, an application for singular configuration is proposed. Several simulation and experimental results are shown to confirm the validity of the proposed method.