A motor comprising: a rotating portion arranged to rotate about a central axis; a stationary portion arranged around the rotating portion; and a bearing mechanism arranged to rotatably support the rotating portion; wherein the rotating portion includes: a plurality of magnets arranged in a circumferential direction; and a rotor core arranged to hold the plurality of magnets, and including flux barriers (63a, 63b) defined therein, the flux barriers (63a, 63b) including first flux barrier pairs each of which includes a pair of the flux barriers; the plurality of magnets include two or more magnet pairs; wherein each of the plurality of magnets includes a pair of long sides and a pair of short sides in a cross section perpendicular to the central axis, the pair of long sides being magnetized to have mutually different polarities; within each of the two or more magnet pairs, magnetic poles of a same polarity are arranged circumferentially opposite to each other, and a center line between the pair of long sides of one of the magnets and a center line between the pair of long sides of the other magnet intersect each other at a point between the central axis and the magnet pair in a cross section perpendicular to the central axis; a first corner of each of the magnets of each magnet pair, the first corner lying on a short-side closer to the other magnet of the magnet pair, is arranged in a separate one of the flux barriers (63a, 63b) defined in the rotor core; the rotor core further includes: an outer core portion arranged radially outside of the first flux barrier pairs, each first flux barrier pair adjoining a separate one of the magnet pairs; an inner core portion arranged radially inside of the first flux barrier pairs; and a joining portion arranged to join the outer core portion and the inner core portion to each other between the pair of the flux barriers of each of the first flux barrier pairs; and the joining portion is arranged to have a minimum circumferential width smaller than a length of each short side characterized in that end points of a boundary between each magnet and a corresponding one of the flux barriers (63a, 63b) lie on one of the pair of long sides which includes the first corner and another one of the pair of long sides. a rotating portion arranged to rotate about a central axis; a stationary portion arranged around the rotating portion; and a bearing mechanism arranged to rotatably support the rotating portion; wherein the rotating portion includes: a plurality of magnets arranged in a circumferential direction; and a rotor core arranged to hold the plurality of magnets, and including flux barriers (63a, 63b) defined therein, the flux barriers (63a, 63b) including first flux barrier pairs each of which includes a pair of the flux barriers; a plurality of magnets arranged in a circumferential direction; and a rotor core arranged to hold the plurality of magnets, and including flux barriers (63a, 63b) defined therein, the flux barriers (63a, 63b) including first flux barrier pairs each of which includes a pair of the flux barriers; the plurality of magnets include two or more magnet pairs; wherein each of the plurality of magnets includes a pair of long sides and a pair of short sides in a cross section perpendicular to the central axis, the pair of long sides being magnetized to have mutually different polarities; within each of the two or more magnet pairs, magnetic poles of a same polarity are arranged circumferentially opposite to each other, and a center line between the pair of long sides of one of the magnets and a center line between the pair of long sides of the other magnet intersect each other at a point between the central axis and the magnet pair in a cross section perpendicular to the central axis; a first corner of each of the magnets of each magnet pair, the first corner lying on a short-side closer to the other magnet of the magnet pair, is arranged in a separate one of the flux barriers (63a, 63b) defined in the rotor core; the rotor core further includes: an outer core portion arranged radially outside of the first flux barrier pairs, each first flux barrier pair adjoining a separate one of the magnet pairs; an inner core portion arranged radially inside of the first flux barrier pairs; and a joining portion arranged to join the outer core portion and the inner core portion to each other between the pair of the flux barriers of each of the first flux barrier pairs; and the joining portion is arranged to have a minimum circumferential width smaller than a length of each short side an outer core portion arranged radially outside of the first flux barrier pairs, each first flux barrier pair adjoining a separate one of the magnet pairs; an inner core portion arranged radially inside of the first flux barrier pairs; and a joining portion arranged to join the outer core portion and the inner core portion to each other between the pair of the flux barriers of each of the first flux barrier pairs; and the joining portion is arranged to have a minimum circumferential width smaller than a length of each short side characterized in that end points of a boundary between each magnet and a corresponding one of the flux barriers (63a, 63b) lie on one of the pair of long sides which includes the first corner and another one of the pair of long sides.