The myocardial infarction detection method includes a hardness measurement step of measuring myocardial stiffness, and a determination step of determining the presence or absence of an infarction based on the myocardial stiffness.心筋梗塞検出方法は、心筋硬さを測定する硬さ測定ステップと、前記心筋硬さに基づいて梗塞の有無を判定する判定ステップと、を含む。