A coin discrimination apparatus which discriminates a bimetallic coin (BC1, BC2) having a ring part (R1, R2), and a core part (C1, C2) provided on an inner side of the ring part (R1, R2) and composed of a different material from that of the ring part (R1, R2), comprising: a conveyor which conveys the bimetallic coin (BC1, BC2); a ring sensor which is arranged at a position where only the ring part (R1, R2) of the bimetallic coin (BC1, BC2) conveyed by said conveyor transits, and which detects magnetic properties; and a core sensor which is arranged at a position where the core part (C1, C2) of the bimetallic coin (BC1, BC2) conveyed by said conveyor transits, and which detects magnetic properties, characterized in that: said conveyor includes; a conveyor path having a laminar shape and which has a flat conveyor face, an upper face of the conveyor face extending laterally, the conveyor surface guiding a bottom face of the bimetallic coin (BC1, BC2); a pair of conveyor guides which are respectively arranged on two sides in a direction orthogonal to a conveyance direction of said conveyor, and are arranged on the conveyor face; and a conveyor belt which is arranged at an upper side of the conveyor face so as to open a prescribed interval between the conveyor belt and the conveyor face, slants so as to draw nearer to one of the conveyor guides toward a downstream side in the conveyance direction, and conveys the bimetallic coin (BC1, BC2) so that the bimetallic coin (BC1, BC2) is constantly in contact with a guide wall face that runs vertically along the one of the conveyor guides. a conveyor which conveys the bimetallic coin (BC1, BC2); a ring sensor which is arranged at a position where only the ring part (R1, R2) of the bimetallic coin (BC1, BC2) conveyed by said conveyor transits, and which detects magnetic properties; and a core sensor which is arranged at a position where the core part (C1, C2) of the bimetallic coin (BC1, BC2) conveyed by said conveyor transits, and which detects magnetic properties, characterized in that: said conveyor includes; a conveyor path having a laminar shape and which has a flat conveyor face, an upper face of the conveyor face extending laterally, the conveyor surface guiding a bottom face of the bimetallic coin (BC1, BC2); a pair of conveyor guides which are respectively arranged on two sides in a direction orthogonal to a conveyance direction of said conveyor, and are arranged on the conveyor face; and a conveyor belt which is arranged at an upper side of the conveyor face so as to open a prescribed interval between the conveyor belt and the conveyor face, slants so as to draw nearer to one of the conveyor guides toward a downstream side in the conveyance direction, and conveys the bimetallic coin (BC1, BC2) so that the bimetallic coin (BC1, BC2) is constantly in contact with a guide wall face that runs vertically along the one of the conveyor guides. said conveyor includes; a conveyor path having a laminar shape and which has a flat conveyor face, an upper face of the conveyor face extending laterally, the conveyor surface guiding a bottom face of the bimetallic coin (BC1, BC2); a pair of conveyor guides which are respectively arranged on two sides in a direction orthogonal to a conveyance direction of said conveyor, and are arranged on the conveyor face; and a conveyor belt which is arranged at an upper side of the conveyor face so as to open a prescribed interval between the conveyor belt and the conveyor face, slants so as to draw nearer to one of the conveyor guides toward a downstream side in the conveyance direction, and conveys the bimetallic coin (BC1, BC2) so that the bimetallic coin (BC1, BC2) is constantly in contact with a guide wall face that runs vertically along the one of the conveyor guides.