A bearing device (1, 1A, 1B, 90) that rotatably supports a rotary member, the bearing device (1, 1A, 1B, 90) comprising: a magnetic ring fixed to the rotary member; and a stator fixed to a non-rotary member so as to face the magnetic ring, wherein the magnetic ring and the stator constitute a claw pole type generator, the stator includes a coil, and a magnetic yoke surrounding the coil, the magnetic yoke is configured by combining a first member (10A-1) and a second member (10A-2) that are magnetic bodies, the first member (10A-1) includes a plurality of first claws arranged in a comb shape, the second member (10A-2) includes a plurality of second claws arranged in a comb shape, the plurality of first claws and the plurality of second claws are alternately arranged on a surface facing the magnetic ring, and the first member (10A-1) and the second member (10A-2) have an identical shape, wherein the stator and the magnetic ring have an annular shape through which a rotation axis of the bearing device (1, 1A, 1B, 90) passes, one of the plurality of first claws and the plurality of second claws are arranged on one side with respect to the coil in cross sections of the stator in a first plane and a second plane including the rotation axis, characterized in that the first member (10A-1) and the second member (10A-2) overlap each other in the order of the first member (10A-1) and the second member (10A-2) in a direction away from the coil on a side opposite to the one side with respect to the coil in the cross section in the first plane, and the first member (10A-1) and the second member (10A-2) overlap each other in the order of the second member (10A-2) and the first member (10A-1) in a direction away from the coil on a side opposite to the one side with respect to the coil in the cross section in the second plane. a magnetic ring fixed to the rotary member; and a stator fixed to a non-rotary member so as to face the magnetic ring, wherein the magnetic ring and the stator constitute a claw pole type generator, the stator includes a coil, and a magnetic yoke surrounding the coil, a coil, and a magnetic yoke surrounding the coil, the magnetic yoke is configured by combining a first member (10A-1) and a second member (10A-2) that are magnetic bodies, the first member (10A-1) includes a plurality of first claws arranged in a comb shape, the second member (10A-2) includes a plurality of second claws arranged in a comb shape, the plurality of first claws and the plurality of second claws are alternately arranged on a surface facing the magnetic ring, and the first member (10A-1) and the second member (10A-2) have an identical shape, wherein the stator and the magnetic ring have an annular shape through which a rotation axis of the bearing device (1, 1A, 1B, 90) passes, one of the plurality of first claws and the plurality of second claws are arranged on one side with respect to the coil in cross sections of the stator in a first plane and a second plane including the rotation axis, characterized in that the first member (10A-1) and the second member (10A-2) overlap each other in the order of the first member (10A-1) and the second member (10A-2) in a direction away from the coil on a side opposite to the one side with respect to the coil in the cross section in the first plane, and the first member (10A-1) and the second member (10A-2) overlap each other in the order of the second member (10A-2) and the first member (10A-1) in a direction away from the coil on a side opposite to the one side with respect to the coil in the cross section in the second plane.