A magnetic refrigeration system arranged to transport heat from a low-temperature-side heat exchanger toward a high-temperature-side heat exchanger, comprising: a plurality of heat transporters each of which is configured to be switched between a heat-generating state and a heat-absorbing state in response to magnetic field application and cancellation of the magnetic field application, a magnetic field application unit that applies a magnetic field to the plurality of heat transporters so that a heat transporter to which a magnetic field is applied and a heat transporter to which a magnetic field is not applied, among the plurality of heat transporters, are alternately arranged in a heat transport direction; and a drive mechanism that periodically moves at least the plurality of heat transporters, among the plurality of heat transporters and the magnetic field application unit, so that a heat transporter, among the plurality of heat transporters, to which a magnetic field is applied by the magnetic field application unit is periodically switched and so that a state of thermal contact among the low-temperature-side heat exchanger, the plurality of heat transporters, and the high-temperature-side heat exchanger is periodically switched when the plurality of heat transporters are arranged between the low-temperature-side heat exchanger and the high-temperature-side heat exchanger, wherein an end portion of at least one heat transporter, among the plurality of heat transporters, in the heat transport direction is a heat transfer accelerator that accelerates heat transfer, wherein at least one heat transporter, among the plurality of heat transporters, includes a body that is made of a magnetic working substance having a magnetocaloric effect and that is configured to be switched between a heat-generating state and a heat-absorbing state in response to the magnetic field application and cancellation of the magnetic field application, characterized in that an end surface of at least one heat transporter, among the plurality of heat transporters, in the heat transport direction is an uneven surface. a plurality of heat transporters each of which is configured to be switched between a heat-generating state and a heat-absorbing state in response to magnetic field application and cancellation of the magnetic field application, a magnetic field application unit that applies a magnetic field to the plurality of heat transporters so that a heat transporter to which a magnetic field is applied and a heat transporter to which a magnetic field is not applied, among the plurality of heat transporters, are alternately arranged in a heat transport direction; and a drive mechanism that periodically moves at least the plurality of heat transporters, among the plurality of heat transporters and the magnetic field application unit, so that a heat transporter, among the plurality of heat transporters, to which a magnetic field is applied by the magnetic field application unit is periodically switched and so that a state of thermal contact among the low-temperature-side heat exchanger, the plurality of heat transporters, and the high-temperature-side heat exchanger is periodically switched when the plurality of heat transporters are arranged between the low-temperature-side heat exchanger and the high-temperature-side heat exchanger, wherein an end portion of at least one heat transporter, among the plurality of heat transporters, in the heat transport direction is a heat transfer accelerator that accelerates heat transfer, wherein at least one heat transporter, among the plurality of heat transporters, includes a body that is made of a magnetic working substance having a magnetocaloric effect and that is configured to be switched between a heat-generating state and a heat-absorbing state in response to the magnetic field application and cancellation of the magnetic field application, characterized in that an end surface of at least one heat transporter, among the plurality of heat transporters, in the heat transport direction is an uneven surface.