PROBLEM TO BE SOLVED: To provide a biological information detection device capable of outputting a vital value of a living body according to a required accuracy. A biological information detection device 1 transmits a transmitted wave by a frequency-modulated continuous wave to an object, and based on a frequency difference between the transmitted wave and a reflected wave from the object, for each distance to the object. Based on the detection result of the detection system 2 that detects the distance spectrum intensity data showing the intensity in time series and the detection result of the detection system 2, the difference between the current distance spectrum intensity data and the previous distance spectrum intensity data is described above. The output data of the difference data calculation units 30 and 40 for calculating the difference data obtained for each distance, the extraction units 37 and 47 for extracting the frequency component corresponding to the vital value of the living body from the difference data, and the extraction units 37 and 47. On the other hand, the determination units 38 and 48 are provided, which determine a plurality of states for performing a plurality of moving average processes having different time widths used for calculation, and output the vital value of the moving average processed for each state. [Selection diagram] Fig. 2【課題】生体のバイタル値を要求される精度に応じて出力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との差を前記距離毎に求めた差分データを算出する差分データ算出部３０、４０と、差分データから生体のバイタル値に対応する周波数成分を抽出する抽出部３７、４７と、抽出部３７、４７の出力データに対して計算に用いる時間幅が異なる複数の移動平均処理を行う複数の状態を判定し、状態毎に移動平均処理したバイタル値を出力する判定部３８、４８とを備える。【選択図】図２
