The present invention relates to a bobber, more specifically, the buoyancy of the bobber (fishing-material is lead) by shaving over several times depending on the state of the reservoir or the depth of the river or water pressure was adjusted buoyancy but the present invention The present invention relates to a fishing bobber that enables the buoyancy control of the fishing bobber to be drastically eliminated even without cutting the lead bonbon. Conventionally, in order to control the buoyancy of fishing bobber by cutting the bondol several times, water pollution is serious on the lead bondol, which is a heavy metal, and according to the government policy, water pollution is prevented and environmental protection and In addition, the focus is on preserving the health of the people, and it is easy to control the buoyancy of the bobber with water only without cutting the lead rods. In addition, since 2012, the use of lead-based products has been replaced with bronze or iron, and these metals have strong strengths, so they have a limitation in controlling buoyancy by cutting or grinding them. In order to achieve the above object, the present invention, in order to adjust the buoyancy of the bobber, the material is plastic, the bobber body is formed inside the empty space is buoyancy is formed, the inside of the body is inserted into the piston piston ring attached to the end of the piston Since there is no gap between the body and the body, the piston reciprocates like a syringe to inhale or discharge the water into the body.The water is sucked into the body to adjust the buoyancy of the bobber according to the amount of water sucked. It consists of a piston, silicone cap, body, lower body, and lower tooth saw, and adjusts the buoyancy by adjusting the water intake by the reciprocating motion of the piston inside the body. [Index] Buoyancy Adjustable Bobber본 발명은 낚시찌에 관한 것으로, 더욱 상세 하게는 낚시찌의 부력을 저수지나 하천의 수심 또는 수압의 상태에 따라 봉돌(낚시추-재질은 납)을 수차례에 걸쳐서 깎아 내어 부력조절을 하였으나 본 발명품은 납
