The present invention is coupled to the fishing line between the fishing float 170 and the cotton thread knot 180, the lower spring 120 is formed vertically in the lower portion, the upper spring 110 is formed in the upper side between the side and the upper part, Buoyancy sphere 100 formed of a spherical shape made of a resin material to float on the water surface, A metal weight 210 is formed in the middle of the resin frame 205 which is coupled to the end of the fishing line and is formed in a column shape with a resin material, and a hole for fitting the fishing needle 150 under the resin frame 205 ( 240) is formed, and when a fishing needle is inserted into the hole 240, a magnet 230 is formed to hold the fishing needle out of the hole by magnetic force, and a fishing line is wound on the upper part of the resin frame 205. Spring 220 is made of a vertically formed descending weight (200), The fishing needle 150 is fitted into the hole 240 of the descending weight 200 and the fishing line is wound on a spring 220 by rotating a predetermined wheel to join the descending weight to the fishing line, and between the fishing rod 170 and the cotton thread knot 180 Winding the fishing line of the buoyancy sphere 100 by rotating a predetermined wheel on the lower spring 120, and rotating the fishing line by a predetermined rotation on the upper spring 110 to combine the buoyancy sphere 100 with the fishing line to descend the weight 200 and buoyancy sphere 100 When combined with a fishing line, and then holding the fishing rod and throwing the descending weight 200 and buoyancy ball 100 into the sea, the fishing line is released and the descending weight 200 descends into the sea to reach the bottom, and the descending weight 200 When the fishing line is stopped when the fishing line is stopped, the weight and pulling force of the descending weight 200 are balanced, and the lower spring of the buoyancy ball 100 tightens the fishing line by pulling the fishing line and p
