An outdoor unit (10, 10') for a refrigeration apparatus, the outdoor unit (10, 10') comprising: a fan configured to provide an air flow; a casing (40, 40') housing therein the fan and having a blow-out port through which the air flow are blown; a first heat generating component configured to generate heat when being energized; a first board on which the first heat generating component is mounted; an electric component box housing therein the first board; and a first cooler configured to cool the first heat generating component, wherein the first cooler includes: a plurality of first heat radiating fins located on a flow path of the air flow and configured to exchange heat with the air flow, characterized in that the first cooler further includes: a heat pipe in which a coolant for heat exchange with the first heat generating component is sealed, the heat pipe being thermally connected to the first heat generating component; and a main body interposed between the heat pipe and the first heat radiating fins to thermally connect the heat pipe to the first heat radiating fins, wherein the heat pipe is located in the electric component box, and is adjacent to the first heat generating component, wherein the heat pipe is separated from a blowing space, the blowing space being a space in the casing (40, 40') wherein a main flow path of the air flow is formed, and wherein the heat pipe is shielded from the air flow by the main body of the first cooler, and wherein the electric component box has a first opening from which the first heat radiating fins are exposed, the main body has an area that is equal to or more than an area of the first opening, and the first cooler is fixed to the electric component box with each heat radiating fin protruding out of the electric component box through the first opening and with the main body closing the first opening. a fan configured to provide an air flow; a casing (40, 40') housing therein the fan and having a blow-out port through which the air flow are blown; a first heat generating component configured to generate heat when being energized; a first board on which the first heat generating component is mounted; an electric component box housing therein the first board; and a first cooler configured to cool the first heat generating component, wherein the first cooler includes: a plurality of first heat radiating fins located on a flow path of the air flow and configured to exchange heat with the air flow, characterized in that the first cooler further includes: a heat pipe in which a coolant for heat exchange with the first heat generating component is sealed, the heat pipe being thermally connected to the first heat generating component; a plurality of first heat radiating fins located on a flow path of the air flow and configured to exchange heat with the air flow, characterized in that the first cooler further includes: a heat pipe in which a coolant for heat exchange with the first heat generating component is sealed, the heat pipe being thermally connected to the first heat generating component; a heat pipe in which a coolant for heat exchange with the first heat generating component is sealed, the heat pipe being thermally connected to the first heat generating component; and a main body interposed between the heat pipe and the first heat radiating fins to thermally connect the heat pipe to the first heat radiating fins, wherein the heat pipe is located in the electric component box, and is adjacent to the first heat generating component, and wherein the heat pipe is shielded from the air flow by the main body of the first cooler, and wherein the electric component box has a first opening from which the first heat radiating fins are exposed, the main body has an area that is equal to or more than an area of the first opening, and the first cooler is fixed to the electric component box with each heat radiating fin protruding out of the electric component box through the first opening and with the main body closing the first opening. the electric component box has a first opening from which the first heat radiating fins are exposed, the main body has an area that is equal to or more than an area of the first opening, and the first cooler is fixed to the electric component box with each heat radiating fin protruding out of the electric component box through the first opening and with the main body closing the first opening.