| 摘要 |
PROBLEM TO BE SOLVED: To provide an ultrasonic wave probe in a coelom, excellent in rotation resistance. SOLUTION: A double shield coaxial cable 8 is constituted by concentrically arranging a central conductor 21, a central insulator 22, a first outer conductor 23, a first insulator 24, a second outer conductor 25 and a second insulator 26 in this order from the center side. The first outer conductor 23 and the second outer conductor 25 have each a spiral covered shield structure. During the rotation of a flexible shaft 11 which makes a housing 10 mounting an ultrasonic vibration piece 2 rotate, the first outer conductor 23 is wound in a direction where the conductor is loosened, on the other hand, the second outer conductor 25 is wound in a direction where it is tightened both during the rotation of the flexible shaft 11.
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