PROBLEM TO BE SOLVED: To provide a bitter taste inhibitor, effective for decreasing the bitterness in a bitter substance, which can be incorporated in foods and medicines.SOLUTION: The bitter taste inhibitor contains at least one of aromatic substance selected from methyl cinnamate, p-methoxy acetophenone, cinnamyl formate, cognac oil, cedrol, methyl anisate, Perilla aldehyde, Tannsy oil, &gamma-undecalactone, methyl benzoate, nerol, benzyl phenyl acetate, rose oil, isopulegol, dodecanal, cumin oil and cyclohexadecanolide.