As the medical application supporting structure, the endoscope (8) the attaching part containment (20) the support arm which is concatenated on Tip side (18) with, is concatenated by the end face side of the support arm, makes the attaching part top and bottom direction and horizontal direction move, the portable arm containment in the portable position (16) with it has, the end face side concatenated section where the support arm, the Tip side concatenated section which revolution unrestrictedly is concatenated (44) with, is laid out the attaching part in this Tip side concatenated section, and coaxial condition in the portable arm revolution is concatenated unrestrictedly (42) with,These Tip sides and it is laid out with the end face side concatenated sections, the offset section which the offset is done (46) with it possesses in the side Tip side and vis-a-vis the axis R which, passes by the end face side concatenated section it turns this offset section, vis-a-vis both parties of the attaching part and the portable arm, axis R as a center.医療用保持装置は、内視鏡(8)を保持する保持部(20)を先端側に連結する支持アーム(18)と、支持アームの基端側に連結され、保持部を上下方向及び水平方向に移動させると共に、その移動位置に保持する移動アーム(16)とを備え、支持アームは、保持部を回転自在に連結する先端側連結部(44)と、この先端側連結部と同軸状に配置され、移動アームに回転自在に連結される基端側連結部(42)と、これらの先端側及び基端側連結部との間に配置され、先端側及び基端側連結部を通る軸線Rに対して側方にオフセットしたオフセット部(46)とを有し、このオフセット部を、保持部と移動アームとの双方に対し、軸線Rを中心として回転させる。
