◎Ye Li・Jun Ohya（Waseda University）・Toshio Chiba（National Center for Child Health and Development）・Rong Xu（Waseda University）・Hiromasa Yamashita（National Center for Child Health and Development）

Towards the realization of a robotic nurse that can support surgeries autonomously, this paper reports a fundamental study of how to recognize the surgeon's action during suture surgery from the video sequence acquired by the camera that observes the surgery scene.