a modified structure of a dart-board comprised of a dart-board, made of paper board, plastic or other magnetic susceptible material, with surface divided into a multiple of scoring segment; a magnetic inductor made of magnetic inducing material provided behind and in the same size and shape of the dart-board to attract the dart point to land at; and a support frame with its inner contour having the same size and shape as that of the dart-board and the magnetic inductor to house both dart-board and magnetic inductor, a ring locking shield protruding inward provided to the edge of said opening to latch both dart-board and magnetic inductor; featuring that slits are provided without magnetic inductor at boundary line to abutted segments on the dart-board corresponding to the magnetic inductor so that when a dart with magnetic point lands on said boundary line, the dart will naturally be attracted by and guided to the segment to score.