An outdoor unit (10, 10') for a refrigeration apparatus, the outdoor unit (10, 10') comprising: a compressor configured to compress a refrigerant; a heat exchanger configured to function as a condenser or as an evaporator for the refrigerant; a fan configured to provide an air flow passing through the heat exchanger, the fan being higher in heightwise position than the compressor; a first electric component configured to control a driven state of the compressor; a second electric component configured to control a driven state of the fan; a board part including a first portion on which the first electric component is mounted, and a second portion on which the second electric component is mounted; a first cooler thermally connected to the first electric component and configured to cool the first electric component, the first cooler being adjacent to the first portion; a second cooler thermally connected to the second electric component and configured to cool the second electric component; a casing (40, 40') housing therein the compressor, the fan, and the board part and having a blow-out port through which the air flow is blown out upward, wherein the air flow is a flow of air flowing from below upward in the casing (40, 40') and flowing out of the casing (40, 40') through the blow-out port, the first cooler includes a plurality of first heat radiating fins located on flow paths of the air flow and configured to exchange heat with the air flow, the second cooler includes a plurality of second heat radiating fins configured to exchange heat with the air flow, the first electric component is lower in heightwise position than the fan and higher in heightwise position than the second electric component, the first heat radiating fins are higher in heightwise position than the second heat radiating fins, the first heat radiating fins are cooled by the air flow subjected to heat exchange with the second heat radiating fins, characterized in that, the first heat radiating fins of the first cooler are arranged with a first fin pitch, the second heat radiating fins of the second cooler are arranged with a second fin pitch, and the first fin pitch is shorter than the second fin pitch. a compressor configured to compress a refrigerant; a heat exchanger configured to function as a condenser or as an evaporator for the refrigerant; a fan configured to provide an air flow passing through the heat exchanger, the fan being higher in heightwise position than the compressor; a first electric component configured to control a driven state of the compressor; a second electric component configured to control a driven state of the fan; a board part including a first portion on which the first electric component is mounted, and a second portion on which the second electric component is mounted; a first portion on which the first electric component is mounted, and a second portion on which the second electric component is mounted; a first cooler thermally connected to the first electric component and configured to cool the first electric component, the first cooler being adjacent to the first portion; a second cooler thermally connected to the second electric component and configured to cool the second electric component; a casing (40, 40') housing therein the compressor, the fan, and the board part and having a blow-out port through which the air flow is blown out upward, wherein the air flow is a flow of air flowing from below upward in the casing (40, 40') and flowing out of the casing (40, 40') through the blow-out port, the first cooler includes a plurality of first heat radiating fins located on flow paths of the air flow and configured to exchange heat with the air flow, the second cooler includes a plurality of second heat radiating fins configured to exchange heat with the air flow, the first electric component is lower in heightwise position than the fan and higher in heightwise position than the second electric component, the first heat radiating fins are higher in heightwise position than the second heat radiating fins, the first heat radiating fins are cooled by the air flow subjected to heat exchange with the second heat radiating fins, characterized in that, the first heat radiating fins of the first cooler are arranged with a first fin pitch, the second heat radiating fins of the second cooler are arranged with a second fin pitch, and the first heat radiating fins of the first cooler are arranged with a first fin pitch, the second heat radiating fins of the second cooler are arranged with a second fin pitch, and the first fin pitch is shorter than the second fin pitch.