The inspection device of sleep apnea syndrome, and analysis unit to be analyzed per unit time the acoustic signal generated during sleep of subjects, patient with sleep apnea syndrome is restored to the respiratory state from apnea state acoustic signal unit time If the determined breath sound whether or contained characteristic sound produced when the feature sound is included in the acoustic signal unit time sleeping condition of the subject seen from the acoustic signals of unit time, "no If there while "ants" breathing sleep state of the subject unit time when it is determined that the respiratory recovery state ", characterized tone is not included in the acoustic signal unit time but breath sounds are included determined, a determination unit to be a "state of no respiration", the sleep state of the subject unit time of the subject per unit time if breathing sound features and sound is not included in the audio signal per unit time If a storage unit for storing the sleep state, the history of the sleep state of the subject indicates the transition to "apnea recovery state" from "a state of no respiration" at least, I and a detector for detecting apnea condition of the subject .睡眠時無呼吸症候群の検査装置は、被験者の睡眠時に生じる音響信号を単位時間毎に分析する分析部と、単位時間の音響信号に睡眠時無呼吸症候群患者が無呼吸状態から呼吸状態へ回復する際に生じる特徴音又は呼吸音が含まれているか否かを判定し、単位時間の音響信号に特徴音が含まれている場合には単位時間の音響信号から見た被験者の睡眠状態が「無呼吸回復状態」であると判定し、単位時間の音響信号に特徴音が含まれていないが呼吸音が含まれている場合には単位時間の被験者の睡眠状態が「呼吸あり状態」であると判定し、単位時間の音響信号に特徴音及び呼吸音が含まれていない場合には単位時間の被験者の睡眠状態が「呼吸なし状態」であると判定する判定部と、単位時間毎の被験者の睡眠状態を格納する格納部と、被験者の睡眠状態の履歴が少なくとも「呼吸なし状態」から「無呼吸回復状態」への推移を示す場合に、被験者の無呼吸状態を検出する検出部とを含む。
