To provide an intestinal peristaltic sound measuring device that can determine an effect of meal intake having on the measurement of the intestinal peristaltic sound.SOLUTION: The presence or absence of meal intake of a subject is determined, based on a ratio held by an integrated value of a sound volume of a second sound component among a total value of the integrated value of the sound volume of a first sound component and the integrated value of the sound volume of a second sound component for a predetermined time (S8). Here, many sound components of the stomach peristaltic sound caused by the stomach peristalsis with the meal are contained in the second sound component. Accordingly, when the ratio held by the integrated value of the sound volume of the second sound component becomes larger than the predetermined level (YES in S8), a determination can be made that the subject is in a state after meal (there is a meal intake). Then, when the subject is in the state after the meal (when the meal intake is present), the determination is made that the meal intake has great effect on the measurement of the intestinal peristaltic sound (S9). When the subject is not in the state after the meal (there is not the meal intake) (NO in S8), the determination can be made that the effect of the meal intake having on the measurement of the intestinal peristaltic sound can be ignored.SELECTED DRAWING: Figure 4【課題】腸蠕動音測定装置において、食事摂取が腸蠕動音の測定に及ぼす影響を判定することを可能にする。【解決手段】所定時間分の第１音成分の音量の積算値と第２音成分の音量の積算値との合計値のうち、第２音成分の音量の積算値が占める割合に基づいて、被験者の食事摂取の有無を判定するようにした（Ｓ８）。ここで、第２音成分には、食事による胃蠕動運動に起因する胃蠕動音の音成分が多く含まれている。従って、第２音成分の音量の積算値が占める割合が所定のレベル以上になると（Ｓ８でＹＥＳ）、被験者が食後の状態である（食事摂取が有り）と判定できる。そして、被験者が食後の状態である（食事摂取が有りのとき）ときには、食事摂取が腸蠕動音の測定に及ぼす影響が大きいと判定し（Ｓ９）、被験者が食後の状態ではない（食事摂取が無い）ときには（Ｓ８でＮＯ）、食事摂取が腸蠕動音の測定に及ぼす影響が無視できると判定できる。【選択図】図４
