to protect normal cells of the affected neighborhood, freezing, thermal efficiency of thawing is to provide a cryosurgical device for a probe outer tube and Chiryoko unit of high simple structure. Having a puncturable tip inside the subject of the affected part, an outer cylinder having an internal space of possible loading hollow a cryosurgical device probe for ejecting alternately frozen gas and thawing gas, the outer cylinder refrigeration has a predetermined region for forming ice blocks on the outer periphery including the tip portion by the freezing gas, the portion other than the predetermined area, with a heat insulating means for interrupting heat exchange between the inner space and the outside to provide a Chiryoko unit, including the probe outer tube and said cryosurgical device for a probe outer tube surgical equipment.患部近傍の正常な細胞を保護し、凍結、解凍の熱効率が高い簡易な構造の冷凍手術装置用プローブ外筒及び治療子ユニットを提供する。被検体内部の患部に穿刺可能な先端部を有し、凍結ガスと解凍ガスとを交互に噴出する冷凍手術装置用プローブを装填可能な中空の内部空間を有する外筒であって、前記外筒は、前記凍結ガスによって前記先端部を含む外周に氷塊を形成する所定領域を有し、前記所定領域以外の部分は、前記内部空間と外部との間の熱交換を遮断する断熱手段を有する冷凍手術装置用プローブ外筒及び前記冷凍手術装置用プローブ外筒を含む治療子ユニットを提供する。
