Title: Grasping Simulator on OpenHRP Authors: Kensuke Harada, Kenji Kaneko, and Tokuo Tsuji This paper first discusses the overview of the simulation/control inegrated environment OpenHRP developed in AIST. Then, we discuss the application of OpenHRP to grasping simulator. We implimented the grasp planner on OpenHRP as a module of the GrxUI . After planning the grasping motion, we can confirm it by the physical simulation.