PROBLEM TO BE SOLVED: To provide a biological information detection device that uses a change value of DC component of a pulse wave sensor signal in a certain period to accurately determine whether it is wearing state or non-wearing state.SOLUTION: The biological information detection device includes: a pulse wave detection part 10 for outputting a pulse wave sensor signal; and a processing part 100 for processing the pulse wave sensor signal. The processing part 100 executes processing of detecting removal of the biological information detection device based on a change value of DC component of the pulse wave sensor signal in a certain period.SELECTED DRAWING: Figure 3【課題】 所与の期間における脈波センサー信号のDC成分の変化値を用いることで、装着状態、非装着状態を精度よく判定する生体情報検出装置等を提供すること。【解決手段】 生体情報検出装置は、脈波センサー信号を出力する脈波検出部10と、脈波センサー信号を処理する処理部100を含み、処理部100は、所与の期間における脈波センサー信号のDC成分の変化値に基づいて、生体情報検出装置の取り外し検出処理を行う。【選択図】 図3