A connector 5 for a medical instrument connected to an external device 100 for medical use is provided, and the connector 5 for a medical instrument includes a plug portion 28 in which electric contact point portions 31 and 33 are placed, outer sheath cases 23 and 24 connectively provided at the plug portion 28, a sub frame member 20 interposed between the plug portion 28 and the outer sheath cases 23 and 24, and having a flange portion 25, and a main frame member 50 housed in the outer sheath cases 23 and 24 and fixed to the sub frame member 20, wherein the plug portion 28 and the outer sheath cases 23 and 24 are butted against the flange portion 28 by different fixing members respectively, and are compressed and fixed to the sub frame member 20.
