Disclosed is a method for producing a carbonyl fluoride which uses carbon monoxide and fluorine as the raw materials while being free from problems such as violent heat generation or decrease of yield due to a side reaction. Specifically disclosed is a method for producing a carbonyl fluoride wherein a carbon monoxide gas and a fluorine gas are introduced into a liquid and carbon monoxide and fluorine are caused to react with each other in the liquid, thereby obtaining a carbonyl fluoride.