The present invention has an object of providing a medical instrument, which has improved operability of an operating line and a reinforced structure around the operating line. The medical instrument has a medical instrument body, a sub-lumen formed in the medical instrument body to extend along the longitudinal direction of the medical instrument body, the operating line housed in the sub-lumen and extended along the longitudinal direction of the medical instrument body, and the first reinforced layer and the second reinforced layer which are tubular. The second reinforced layer is arranged away from the first reinforced layer and arranged around the first reinforced layer, and part of resin which comprises the medical instrument body is filled between the first reinforced layer and the second reinforced layer. The sub-rumen is arranged inside the part of resin which comprises the medical instrument body.本發明之目的在於提供一種操作線之操作性良好、且操作線之周圍得到充分地加強之構造之醫療機器。本發明之醫療機器包含:醫療機器本體;以沿著醫療機器本體之長度方向延伸之方式配置於醫療機器本體之內部之副腔;插通於副腔內且沿著醫療機器本體之長度方向延伸之操作線;及管狀之第1加強層與第2加強層。第2加強層以包圍第1加強層之周圍之方式,與第1加強層隔開而配置,構成醫療機器本體之樹脂之一部分被填充於第1加強層與第2加強層之間。副腔係配置於構成醫療機器本體之樹脂之該一部分之內部。10‧‧‧導管15‧‧‧遠端部16‧‧‧護套18‧‧‧第1鄰接區域19‧‧‧第2鄰接區域20‧‧‧主腔21‧‧‧內層30‧‧‧副腔32‧‧‧中空管40‧‧‧操作線41‧‧‧前端部50‧‧‧第1加強層51‧‧‧第2加強層51a‧‧‧近端側部51b‧‧‧遠端側部60‧‧‧外層64‧‧‧塗層66‧‧‧第1標記物67‧‧‧第2標記物DE‧‧‧遠端
