A refrigerant distributor comprising: a first refrigerant pipe allowing a refrigerant to flow therethrough; a plurality of second refrigerant pipes allowing the refrigerant to flow therethrough; a body made of aluminum or an aluminum alloy, having a first surface connected to the first refrigerant pipe and a second surface connected to the plurality of second refrigerant pipes, configured to distribute the refrigerant flowing from the first refrigerant pipe into the plurality of second refrigerant pipes or merge the refrigerant flowing from each of the second refrigerant pipes into the first refrigerant pipe, characterized in that the refrigerator distributor further comprises a first plate joined to the first surface and having an outer surface that is exposed to atmosphere and is provided with a first sacrificial anode layer for the body; and a second plate joined to the second surface and having an outer surface that is exposed to atmosphere and is provided with a second sacrificial anode layer for the body, wherein the body includes a first member made of aluminum or an aluminum alloy and having a cylindrical shape, and a second member having a concave portion receiving the first member and made of a material for the first member, the first member has the first surface on a side opposite to a side fitted into the concave portion, the second member has the second surface on a side opposite to the concave portion, and the concave portion receiving the first member has an internal space for distribution of the refrigerant, and wherein the first member and the second member are not provided with any sacrificial anode layer. a first refrigerant pipe allowing a refrigerant to flow therethrough; a plurality of second refrigerant pipes allowing the refrigerant to flow therethrough; a body made of aluminum or an aluminum alloy, having a first surface connected to the first refrigerant pipe and a second surface connected to the plurality of second refrigerant pipes, configured to distribute the refrigerant flowing from the first refrigerant pipe into the plurality of second refrigerant pipes or merge the refrigerant flowing from each of the second refrigerant pipes into the first refrigerant pipe, characterized in that the refrigerator distributor further comprises a first plate joined to the first surface and having an outer surface that is exposed to atmosphere and is provided with a first sacrificial anode layer for the body; and a second plate joined to the second surface and having an outer surface that is exposed to atmosphere and is provided with a second sacrificial anode layer for the body, wherein the body includes a first member made of aluminum or an aluminum alloy and having a cylindrical shape, and a second member having a concave portion receiving the first member and made of a material for the first member, the first member has the first surface on a side opposite to a side fitted into the concave portion, the second member has the second surface on a side opposite to the concave portion, and the concave portion receiving the first member has an internal space for distribution of the refrigerant, and wherein the first member and the second member are not provided with any sacrificial anode layer.