PROBLEM TO BE SOLVED: To provide a taste improver for improving taste of a taste substance made from potassium salt.SOLUTION: This taste improver for a taste substance is made from potassium salt, and includes poly-&gamma-glutamic acid or its salt. An average molecular weight of the poly-&gamma-glutamic acid is preferably (3×103) or above.COPYRIGHT: (C)2009,JPO&INPIT【課題】カリウム塩からなる呈味物質の呈味を改善する。【解決手段】カリウム塩からなる呈味物質にポリ-γ-グルタミン酸またはその塩を共存させる。【選択図】なし