A refrigeration apparatus, comprising: a refrigerant circuit, a refrigerant circulating in the refrigerant circuit by a compressor to perform a refrigeration cycle, wherein, as refrigerant of the refrigerant circuit, refrigerant represented by Molecular Formula 1: C 3 H m F n where "m" and "n" are integers equal to or greater than 1 and equal to or less than 5, and a relationship represented by an expression m + n = 6 is satisfied, and having a single double bond in a molecular structure, or refrigerant mixture containing the refrigerant is used, predetermined functional resin components (61, 62, 63, 64, 65) arranged so as to contact the refrigerant of the refrigerant circuit are made of any of polytetrafluoroethylene, polyphenylene sulfide, phenolic resin, polyamide resin, chloroprene rubber, silicone rubber, hydrogenated nitrile rubber, fluorine-containing rubber, and hydrin rubber, in the compressor, refrigerant oil is used, which has a saturated water amount of equal to or greater than 2000 ppm at a temperature of 30°C and a relative humidity of 90%, the refrigerant oil mainly contains at least one of polyalkylene glycol, polyol ester, and polyvinyl ether, the refrigerant oil has surface tension of equal to or greater than 0.02 N/m and equal to or less than 0.04 N/m at 20°C, to the refrigerant oil, an extreme pressure additive is added, and the extreme pressure additive contains any of: an extreme pressure additive containing phosphorus-containing esters; an organic sulfur compound extreme pressure additive such as monosulfides, polysulfides, sulfoxides, sulfones, thiosulfinates, oil sulfides, thiocarbonates, thiophenes, thiazoles, and methanesulfonate esters; a thiophosphate extreme pressure additive such as thiophosphate triesters; an ester extreme pressure additive such as higher fatty acids, hydroxyaryl fatty acids, polyhydric alcohol esters, and acrylic acid esters; an organic chloride extreme pressure additive such as chlorinated hydrocarbons and chlorinated carboxylic acid derivatives; an organic fluorine extreme pressure additive such as fluorinated aliphatic carboxylic acids, fluorinated ethylene resin, fluorinated alkyl polysiloxanes, and fluorinated graphites; an alcohol extreme pressure additive such as higher alcohol; and a metal compound extreme pressure additive such as naphthenates, fatty acid salts, thiophosphates, thiocarbamic acid salts, an organic molybdenum compound, an organotin compound, an organogermanium compound, and borate esters. a refrigerant circuit, a refrigerant circulating in the refrigerant circuit by a compressor to perform a refrigeration cycle, wherein, as refrigerant of the refrigerant circuit, refrigerant represented by Molecular Formula 1: C 3 H m F n where "m" and "n" are integers equal to or greater than 1 and equal to or less than 5, and a relationship represented by an expression m + n = 6 is satisfied, and having a single double bond in a molecular structure, or refrigerant mixture containing the refrigerant is used, predetermined functional resin components (61, 62, 63, 64, 65) arranged so as to contact the refrigerant of the refrigerant circuit are made of any of polytetrafluoroethylene, polyphenylene sulfide, phenolic resin, polyamide resin, chloroprene rubber, silicone rubber, hydrogenated nitrile rubber, fluorine-containing rubber, and hydrin rubber, in the compressor, refrigerant oil is used, which has a saturated water amount of equal to or greater than 2000 ppm at a temperature of 30°C and a relative humidity of 90%, the refrigerant oil mainly contains at least one of polyalkylene glycol, polyol ester, and polyvinyl ether, the refrigerant oil has surface tension of equal to or greater than 0.02 N/m and equal to or less than 0.04 N/m at 20°C, to the refrigerant oil, an extreme pressure additive is added, and the extreme pressure additive contains any of: an extreme pressure additive containing phosphorus-containing esters; an organic sulfur compound extreme pressure additive such as monosulfides, polysulfides, sulfoxides, sulfones, thiosulfinates, oil sulfides, thiocarbonates, thiophenes, thiazoles, and methanesulfonate esters; a thiophosphate extreme pressure additive such as thiophosphate triesters; an ester extreme pressure additive such as higher fatty acids, hydroxyaryl fatty acids, polyhydric alcohol esters, and acrylic acid esters; an organic chloride extreme pressure additive such as chlorinated hydrocarbons and chlorinated carboxylic acid derivatives; an organic fluorine extreme pressure additive such as fluorinated aliphatic carboxylic acids, fluorinated ethylene resin, fluorinated alkyl polysiloxanes, and fluorinated graphites; an alcohol extreme pressure additive such as higher alcohol; and a metal compound extreme pressure additive such as naphthenates, fatty acid salts, thiophosphates, thiocarbamic acid salts, an organic molybdenum compound, an organotin compound, an organogermanium compound, and borate esters.