PROBLEM TO BE SOLVED: To provide a cerebral circulation condition examining device and a stress meter equipped with the device which improve the reliability of detected information compared with the prior art to reduce a burden on an engineer and acquire an index or the like of a cerebral circulation condition of high accuracy easily in an early stage.SOLUTION: The cerebral circulation condition examining device includes: a detecting part 3 detecting the cerebral circulation condition of an examined object an indexing part 7 indexing the cerebral circulation condition from the detected information from the detecting part 3 and a disturbance specifying part 6 specifying information influenced by disturbance, out of the detected information. The disturbance specifying part 6 acquires output values synchronous with the detecting operation of the detecting part 3, and determines, as invalid information, detected information of a section S in which the output values exceed a threshold 9. The indexing part 7 indexes the cerebral circulation condition from the detected information excluding the invalid information.COPYRIGHT: (C)2012,JPO&INPIT【課題】検出情報の信頼性を従来のものより向上させ、技術者負担を低減すると共に、高精度の脳循環状態の指標等を早期に且つ容易に得易くした脳循環状態検査装置及びそれを備えるストレス計を提供する。【解決手段】この課題を解決するために、検査対象の脳循環状態を検出する検出部3と、前記検出部3からの検出情報から脳循環状態を指標化する指標化部7と、前記検出情報から外乱の影響を受けたものを特定する外乱特定部6と、を有し、前記外乱特定部6は、前記検出部3の検出動作に同期した出力値を取得すると共に、前記出力値が閾値9を超えた区間Sの検出情報を無効情報と定め、前記指標化部7は前記無効情報を除いた検出情報から脳循環状態を指標化するものとした。【選択図】図1