PROBLEM TO BE SOLVED: To obtain an agent for effectively suppressing the decrease of citral caused by light irradiation during the production, distribution, storage, or the like, of a citral-containing product and the formation of degradation smell originated from citral without giving influence on the characteristic taste and flavor of the citral-containing product, and provide a method for suppressing the decrease of citral. SOLUTION: The agent for suppressing the decrease of citral is composed of at least one component selected from the solvent extract of mint, mugwort, orange, lemon, grapefruit, or the like, and caffeic acid, ferulic acid, sinapic acid, rosmarinic acid, dicaffeoyl quinic acid, cumaric acid, &alpha-glucosyl rutin, quercetin, myricitrin, quercitrin, &gamma-orizanol, kaempferol, hesperetin, chrysin, luteolin-7-glucoside, 6-hydroxyflavone, 7-hydroxyflavone, pratol and 7,8- dihydroxyflavone. Decrease of citral can be suppressed by adding the agent to citral or the citral-containing product in an amount of 1-500 ppm.
