PROBLEM TO BE SOLVED: To improve the sensitivity of fish shin, to accurately visually recognize the fish's snail, and to reduce the influence from frictional resistance and wind resistance, and to smoothly send the yarn, so that Aiming at the (swimming layer) and providing a floating float that improves fishing results. A curved insertion hole (20) penetrating a floating body (10) is provided, and the curved insertion hole (20) sends out a line thread at an angle of 0 to 30 degrees, so that when the fish eats the bait, it is pulled by the fish. The fishing line was pulled, and the curved insertion hole 20 was strongly pressed against the fishing line, so that frictional resistance was generated on the inner wall surface of the curved insertion hole 20, and the hollow float was fixed to the fishing line. [Selection diagram] Fig. 5【課題】魚信の感度を向上させ、魚のアタリを的確に視認でき、加えて、摩擦抵抗及び風の抵抗からの影響を低減し、道糸をスムーズに送り出すことが出来るので、速やかにタナ（遊泳層）に着き、釣果の向上につながる中通し浮きを提供する。【解決手段】浮き本体１０を貫穿される湾曲挿通孔２０とを備え、湾曲挿通孔２０は道糸を０～３０度の角度で送り出すことで、魚が餌に食いついた際、魚の引く力で釣り糸が引っ張られ、湾曲挿通孔２０が釣り糸に強く押し付けられて、湾曲挿通孔２０の内壁面に摩擦抵抗が生じ、中通し浮きが釣り糸に固定されるようにした。【選択図】図５
