The present invention relates to a float for sea fishing and, more particularly, to a float for sea fishing which removes inconvenience of keeping various floats and enables easy throwing of a fishing line without twisting the fishing line by being formed in a standing, semi-standing, or non-standing form, thereby diversely adjusting buoyancy of the float according to wave heights and fish species to be fished. Further, the float for sea fishing of the present invention can add the fun of fishing by allowing a fisher to easily understand fish signals, and sort out fish species to be fished. The float for sea fishing having various buoyancy control functions includes: a core member (10) a first buoyant body (20) attached to the core member (10) such that the first buoyant body (20) passes through one end of the core member (10) a second buoyant body (30) which is attached to the core member (10) such that a central portion of the second buoyant body (30) is inserted into the other end of the core member (10) to which the first buoyant body (20) is attached, and in which a connecting pulley (32) for being connected to an original fishing line is installed at one end thereof a weight (40) whose central portion is penetrated by the core member (10), and which is disposed between the first buoyant body (20) and the second buoyant body (30), installed on the core member (10), and movable with respect to the core member (10) and stoppers (50) whose central portions are penetrated by the core member (10) at the front and rear sides of the weight (40) and which adjust the position of the weight (20). The float for sea fishing according to the present invention has merits in that a universal hole or bar float may be used in a projecting state at a state that the float for sea fishing is thrown on the surface of water such that arrangements are lined up, and buoyancy can be diversely adjusted by selecting locations of a weight which may be movably fixed to the core member betw
