With general surgical operation and operation of the mirror apparent bottom being enabled, not only mere sucking/absorbing liquid characteristic and preservation liquid characteristic, it offers the operation equipment which consists of the material which has the syneresis characteristic which is superior. The aforementioned operation equipment is the preservation liquid expedient which consists of the porous soft material which temporarily possesses storing liquid characteristic and automorphic characteristic the spacer between the internal organs which feature that it includes (1) (10).一般的外科手術と鏡視下手術とで使用可能であって、単なる吸液性、保液性だけでなく、優れた離液性を備えた素材からなる手術用具を提供する。前記の手術用具は、一時貯液性と保形性とを有する多孔性軟質材料からなる保液手段(1)を含むことを特徴とする臓器間スペーサー(10)である。