[Summary] [Problem] Provision of a method of imparting aroma or flavor to food. [Solving Means]An aroma or flavor-imparting composition containing methional, dienals and thiazoles in proportions satisfying 0‰¤A‰¤100, 0‰¤B‰¤100, 0‰¤C‰¤60 and A+B+C=100 wherein A shows parts by weight of niethional, B shows parts by weight of dienals and C shows parts by weight of thiazoles.