To provide a technique for estimating a heart rate based on physical activity information which is not influenced by a psychological state, but not physiological data such as an electrocardiogram or a pulse which are easily affected by a psychological state.SOLUTION: The heart rate estimating apparatus sets the sum total of the past momentum affecting the heart rate at a certain time as the exercise intensity estimation value and calculates the estimated time t (t) using the momentum of the time series subjectKBased on the exercise amount exercised by the subject during the period before the estimation time tKAn exercise intensity estimating unit for estimating an exercise intensity estimated value of the exercise intensity by using an exercise intensity estimation value and a heartbeat-exercise intensity relation model showing the relationship between exercise intensity and heart rate,KAnd a heart rate estimating unit that estimates a heart rate in the heart rate.(FIG.【課題】心理状態の影響を受けやすい心電や脈等の生理学的データではなく、心理状態の影響を受けずらい身体活動の情報に基づき心拍数を推定する技術を提供する。【解決手段】心拍数推定装置は、ある時刻の心拍数に影響を与える過去の運動量の総和を運動強度推定値とし、時系列の対象者の運動量を用いて、推定時刻tkよりも前の期間に対象者が実施した運動の運動量に基づき、推定時刻tkの運動強度推定値を求める運動強度推定部と、運動強度推定値と、運動強度と心拍数との関係を示す心拍-運動強度関係モデルとを用いて、推定時刻tkにおける心拍数を推定する心拍数推定部とを含む。【選択図】図6
