Abstract: An electronic float for fishing tackle in which when a fish bites a bait, a floater (1) moves up and down, causing a magnet (5) inside the hollow of the floater (1) to move, accordingly, up and down nearing or falling apart from a fixed magnet (3) below, thus the equilibrium of the magnet (5) is broken and inertial force is created for the magnet (5) in a vertical direction to keep its up and down motion, thereby to turn the switching means on or off. But, when the floater (1) is stirred by a wind or the waves, inertial force of the magnet (5) is kept negligible, and the magnet (5) hits against the side of wall of the hollow to get its vertical up-down move restrained, and the switching means (4) does not get turned on or off.