To solve these problems, we propose a motion editing system that uses a motion capture device (see Figure 1 and 2). The system user can capture a motion and edit the captured motion using the same motion capture device, going back and forth between the motion capture and editing processes. We developed a mocap-based interface for specifying motion editing parameters required for our motion editing methods such as time period, body part selection, end-effector position, pose, and motion segment.