PROBLEM TO BE SOLVED: To provide a biological signal measuring device capable of acquiring various biological information and applicable to the medical field and the like, a biological state estimating device, and a biological state estimating system using the same. SOLUTION: The biological signal measuring device 1 of the present invention includes three biological signal detecting sections, an upper left biological signal detecting section 11, an upper right biological signal detecting section 12, and a lower biological signal detecting section 13. .. The biological state estimating apparatus 1 can obtain a highly accurate estimation processing waveform from which electrical noise is removed by appropriately combining and using the respective time series data obtained from the three biological signal detecting units 11 to 13. .. Since the accuracy of the processing waveform for estimation corresponding to the target biological information such as breathing and heart sounds increases, the estimation accuracy of the biological state also increases. [Selection diagram]【課題】 様々な生体情報を取得可能で、医療分野等への応用も可能な生体信号測定装置、生体状態推定装置、並びに、それらを用いた生体状態推定システムを提供する。【解決手段】 本発明の生体信号測定装置１は、左上部生体信号検出部１１と、右上部生体信号検出部１２と、下部生体信号検出部１３との３つの生体信号検出部を備えている。生体状態推定装置１は、この３つの生体信号検出部１１～１３から得られる各時系列データを適宜に組み合わせて用いることで、電気ノイズを除去した精度の高い推定用処理波形を得ることができる。呼吸や心音などの目的とする生体情報に対応した推定用処理波形の精度が高まるため、生体状態の推定精度も高くなる。【選択図】 図１
