The present invention pertains to a fat emulsion which comprises flurbiprofen axetil, water, a vegetable oil, egg yolk lecithin, glycerol and histidine or a salt thereof, wherein the total content of histidine or a salt thereof is 0.025-0.19 part by mass inclusive, in terms of histidine, per part by mass of flurbiprofen axetil.本發明關於一種脂肪乳劑,該脂肪乳劑含有氟比洛芬酯、水、植物油、蛋黃卵磷脂、甘油、及組胺酸或其鹽,其中相對於1單位質量的氟比洛芬酯,組胺酸或其鹽的含量在組胺酸換算之總量下為0.025單位質量以上、0.19單位質量以下。