PROBLEM TO BE SOLVED: To provide a coaxial cable for an endoscope that does not deteriorate flex resistance substantially though a single-wire conductor is adopted for a central conductor as compared with a case where a twisted-wire conductor is adopted for a central conductor, and can transmit a high-speed digital signal while maintaining an outer diameter of the central conductor at a conventional level.SOLUTION: A coaxial cable 100 for an endoscope includes a central conductor 101, an insulator 102 provided around the central conductor 101, and an external conductor 103 provided around the insulator 102. The central conductor 101 includes a single-wire conductor 105 made of beryllium copper, and silver plating 106 provided around the single-wire conductor 105.SELECTED DRAWING: Figure 1【課題】単線導体を中心導体に採用しながらも撚線導体を中心導体に採用する場合と比較して耐屈曲性を大幅に低下させず、しかも中心導体の外径を従来と同等に維持しながら高速のデジタル信号を伝送することが可能な内視鏡用同軸ケーブルを提供する。【解決手段】中心導体１０１と、中心導体１０１の周囲に設けられる絶縁体１０２と、絶縁体１０２の周囲に設けられる外部導体１０３と、を備え、中心導体１０１は、ベリリウム銅からなる単線導体１０５と、単線導体１０５の周囲に設けられる銀鍍金１０６と、を有する内視鏡用同軸ケーブル１００によって課題を解決する。【選択図】図１
