Provided is an outdoor unit for a refrigeration apparatus, the outdoor unit being capable of suppressing decrease in reliability. An outdoor unit (10) includes: a compressor (12); an outdoor fan (18) configured to provide outdoor air flows (AF), the outdoor fan (18) being higher in heightwise position than the compressor (12); a high-heat generating electric component (65) configured to control the compressor (12); a fan controlling electric component (66) configured to control the outdoor fan (18); a board unit (75) including a compressor controlling electric component mount portion (75a) and a fan controlling electric component mount portion (75b); a first cooling unit (80); and an outdoor unit casing (40). The outdoor air flows (AF) flow from below upward in the outdoor unit casing (40), and flow out of the outdoor unit casing (40) through a blow-out port (402). The first cooling unit (80) includes a plurality of first cooling unit fins (81) located on flow paths of the outdoor air flows (AF), the first cooling unit fins (81) being adjacent to the compressor controlling electric component mount portion (75a). The high-heat generating electric component (65) is lower in heightwise position than the outdoor fan (18) and higher in heightwise position than the fan controlling electric component (66).