PROBLEM TO BE SOLVED: To provide an internal organ contact implement and a medical master-slave system with improved flexibility in treatment.SOLUTION: The internal organ contact implement 10B coming into contact with an internal organ 50 includes: a contact base 10B1a coming into contact with the internal organ 50 and a surgical instrument holding part 10B1b for holding at least one surgical instrument to be used for the treatment of the internal organ 50. The surgical instrument holding part 10B1b is coupled to the contact base 10B1a in such a way that movability of at least one degree of flexibility is secured.COPYRIGHT: (C)2011,JPO&INPIT【課題】処置の自由度(処置容易性)を向上させた臓器接触具及び医療用マスタ・スレーブシステムを提供すること。【解決手段】臓器50に接触する臓器接触具10Bを次のように構成する。すなわち、前記臓器50に接触する接触基部10B1aと、前記臓器50に対する処置に用いられる一つ以上の術具を保持する術具保持部10B1bと、を具備させ、前記術具保持部10B1bを、前記接触基部10B1aに対して、少なくとも1自由度の可動性を有するように連結する。【選択図】図4