A refrigeration apparatus having a refrigerant circuit, comprising: a heavy electric component group (20, 92, 94, 96, 97, 99, 104) including a power device; a light electric component group (98, 101, 103); a printed wiring board, on one main surface of which the heavy electric component group (20, 92, 94, 96, 97, 99, 104) and the light electric component group (98, 101, 103) are mounted, the printed wiring board being disposed in a vertical direction; a refrigerant pipe through which a refrigerant of the refrigerant circuit flows; and a refrigerant jacket cooling the power device by a refrigerant flowing in a cooling portion which is one portion of a liquid pipe of the refrigerant pipe, wherein the main surface of the printed wiring board includes: a heavy electric region which is a region in a lower part of the printed wiring board where the heavy electric component group (20, 92, 94, 96, 97, 99, 104) is disposed; and a light electric region which is a region situated above the heavy electric region, where the light electric component group (98, 101, 103) is disposed, and wherein the refrigerant jacket contacts the power device arranged in the heavy electric region; and the liquid pipe of the refrigerant pipe includes a portion extending upwards towards the refrigerant jacket, and the cooling portion contacts the refrigerant jacket; the refrigeration apparatus being characterized in that the power device includes a first inverter, a second inverter, a first converter and a second converter, wherein the first inverter, the second inverter, the first converter and the second converter are aligned in one row in this order from the top in the vertical direction on the main surface of the printed wiring board, and wherein the refrigerant jacket is formed in a long thin shape so as to correspond to this row. a heavy electric component group (20, 92, 94, 96, 97, 99, 104) including a power device; a light electric component group (98, 101, 103); a printed wiring board, on one main surface of which the heavy electric component group (20, 92, 94, 96, 97, 99, 104) and the light electric component group (98, 101, 103) are mounted, the printed wiring board being disposed in a vertical direction; a refrigerant pipe through which a refrigerant of the refrigerant circuit flows; and a refrigerant jacket cooling the power device by a refrigerant flowing in a cooling portion which is one portion of a liquid pipe of the refrigerant pipe, wherein the main surface of the printed wiring board includes: a heavy electric region which is a region in a lower part of the printed wiring board where the heavy electric component group (20, 92, 94, 96, 97, 99, 104) is disposed; and a light electric region which is a region situated above the heavy electric region, where the light electric component group (98, 101, 103) is disposed, and wherein the refrigerant jacket contacts the power device arranged in the heavy electric region; and the liquid pipe of the refrigerant pipe includes a portion extending upwards towards the refrigerant jacket, and the cooling portion contacts the refrigerant jacket; the refrigeration apparatus being characterized in that the power device includes a first inverter, a second inverter, a first converter and a second converter, wherein the first inverter, the second inverter, the first converter and the second converter are aligned in one row in this order from the top in the vertical direction on the main surface of the printed wiring board, and wherein the refrigerant jacket is formed in a long thin shape so as to correspond to this row. a heavy electric region which is a region in a lower part of the printed wiring board where the heavy electric component group (20, 92, 94, 96, 97, 99, 104) is disposed; and a light electric region which is a region situated above the heavy electric region, where the light electric component group (98, 101, 103) is disposed, and wherein the refrigerant jacket contacts the power device arranged in the heavy electric region; and the liquid pipe of the refrigerant pipe includes a portion extending upwards towards the refrigerant jacket, and the cooling portion contacts the refrigerant jacket; the refrigeration apparatus being characterized in that the power device includes a first inverter, a second inverter, a first converter and a second converter, wherein the first inverter, the second inverter, the first converter and the second converter are aligned in one row in this order from the top in the vertical direction on the main surface of the printed wiring board, and wherein the refrigerant jacket is formed in a long thin shape so as to correspond to this row.