PROBLEM TO BE SOLVED: To provide a flexible tube of a medical manipulator, having excellent torsional stiffness, load bearing, and flexibility, while being downsized.;SOLUTION: The flexible tube of a medical manipulator, made of a superelastic alloy, includes: a plurality of ring parts 21 consecutively provided in the axial direction; tube connecting parts 23a and 23b for connecting between the axially-adjacent ring parts 21, at one parts in the circumferential direction; and tube slits 25 delimited between the axially-adjacent ring parts 21, on both sides in the circumferential direction of the tube connecting parts 23a and 23b, and allowing the flexible tube 15 to bend by bending of the tube connecting parts 23a and 23b. The axial-width w1, as a size in the axial direction, of the ring parts 21 is set to equal to or less than a largest circumferential width w2, as a size in the circumferential direction of the tube connecting parts 23b.;SELECTED DRAWING: Figure 3;COPYRIGHT: (C)2019,JPO&INPIT
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