In this paper, a distributed controller of the motion system with redundancy is proposed by using a disturbance observer. The motion controller of a redundant manipulator must simplify calculation, including task planning of redundant motion for use of redundancy. This paper proposes a distributed solution without excess calculation by observing interactive acceleration between subtask space. Then the proposed approach does not require strict mapping of the subtask vector into the null space of the Jacobian matrix and the introduction of the variable ratio of disturbance suppression makes it possible to consider the independence of the user-defined additional task. The validity of the proposed method is confirmed by simulation.