Problem: to detect the heart rate component accurately and stably.A biological signal acquisition section 421 for acquiring a living body signalFrom the waveform of the biological signal acquired by the biological signal acquisition partA wave group obtaining section 423 for obtaining the width and shape of the wave group for extracting a particular waveform component periodically included in the waveform andThe range of waves obtained in the wave swarm acquisition sectionA range detector 424 detected from a biological signalA peak detecting section 426 is provided for detecting the maximum value of the specific position of the wave group detected by the range detecting section as a specific wave forming portion.The peak detecting section 426 detects R and T waves of the electrocardiogram waveform.Diagram【課題】心拍成分の検出を精度良く安定的に行えるようにする。【解決手段】生体信号を取得する生体信号取得部４２１と、生体信号取得部が取得した生体信号の波形から、その波形に周期的に含まれる特定の波形成分を抽出するための波群の幅および形状を取得する波群取得部４２３と、波群取得部で得た波群の範囲を、生体信号から検出する範囲検出部４２４と、範囲検出部が検出した波群の特定位置の最大値を特定の波形成分として検出するピーク検出部４２６とを備える。ピーク検出部４２６は、心電図波形のＲ波やＴ波などを検出する。【選択図】図１
