The present invention provides a medical instrument which is capable of reducing damage, such as cutting of a wire, to the medical instrument even if excessively large load is applied to an inserting portion. A medical instrument including: a deformable portion a wire configured to deform the deformable portion a driving unit configured to drive the wire a drive control unit configured to control the driving unit and a load detecting unit configured to detect load applied to the deformable portion, wherein when the load detected by the load detecting unit exceeds a threshold value, the drive control unit controls the driving unit to retain posture of the deformable portion.
