The living body monitoring apparatus and the living body monitoring method according to the present invention, and the living body monitoring system using the living body monitoring apparatus are based on the signal intensity in the Doppler signal for a predetermined time, and whether or not there is the first type of first movement in the living body to be monitored. And based on a normalized signal obtained by normalizing the Doppler signal of the predetermined time with the signal intensity, the presence or absence of a second type of second movement different from the first type in the living body to be monitored is determined, And based on these 1st and 2nd determination results, the presence or absence of the final motion in the said biological body to be monitored is determined.本発明にかかる生体監視装置および生体監視方法ならびに前記生体監視装置を用いた生体監視システムは、所定時間のドップラ信号における信号強度に基づいて、監視対象の生体における第１種類の第１動きの有無を判定し、前記所定時間のドップラ信号を前記信号強度で正規化した正規化信号に基づいて、前記監視対象の生体における前記第１種類と異なる第２種類の第２動きの有無を判定し、そして、これら第１および第２判定結果とに基づいて、前記監視対象の生体における最終的な動きの有無を判定する。
