The present invention relates to maintain the operability that allows the adjustment of the stiffness and deflection amount instantly, and can be stepless and subtle adjustment. None of the A-shaped hollow rod, the rod body 5 having flexibility, and adjusting core 10 which is inserted into the hollow rod body 5, rotatably connected to the rear end of the rod body 5 is provided with a rear grip portion 21 for holding the adjusting core 10 which is inserted into the rod body 5, adjusting core 10, the hardness is varied according to the rotation angle of the grip portion 2.【課題】剛性及び撓み量の調節を瞬時に行える操作性を維持し、無段階且つ微妙な調節が可能とする。【解決手段】内部中空のロッド状をなし、可撓性を有する竿本体5と、竿本体5内の中空に挿入される調節用芯材10と、竿本体5の後端に回転可能に連結され、竿本体5内に挿通された調節用芯材10を保持するリアグリップ部21とを備え、調節用芯材10は、グリップ部2の回転角度に応じて硬度が変化される。
