PROBLEM TO BE SOLVED: To provide a biological information detecting device capable of detecting information on a living body including presence / absence of a living body. A biological information detecting device (1) transmits a transmission wave of a frequency-modulated continuous wave to an object, and based on a frequency difference between the transmission wave and a reflected wave from the object, for each distance to the object. Based on the detection result of the detection system 2 and the detection result of the detection system 2, the distance spectrum intensity data of the present and the previous distance spectrum intensity data A calculation unit 40 that calculates difference data obtained by obtaining a difference from the result of the moving average process for each distance, and a determination unit 45 that determines the presence of a living body based on the difference data. [Selection diagram] Figure 2【課題】生体の在／不在を含む生体に関する情報を検出することができる生体情報検出装置を提供する。【解決手段】生体情報検出装置１は、周波数変調した連続波による送信波を対象物に送信し、送信波と前記対象物からの反射波との周波数差に基づいて、対象物までの距離毎の強度を時系列的に示す距離スペクトル強度データを検出する検出系２と、検出系２の検出結果に基づいて、現在の距離スペクトル強度データとその１つ前の距離スペクトル強度データに対して行った移動平均処理の結果との差を距離毎に求めた差分データを算出する算出部４０と、差分データに基づいて、生体の存在を判定する判定部４５とを備える。【選択図】図２
