PROBLEM TO BE SOLVED: To provide a flavor composition that can impart an unconventional citrus-like flavor and fragrance.SOLUTION: The present invention provides a flavor composition comprising 4-(4-methyl-3-pentenyl)-2(5H)-furanone as an active ingredient and a food product or perfumery comprising 4-(4-methyl-3-pentenyl)-2(5H)-furanone.SELECTED DRAWING: None