Problem to be solved: to provide an out of term contraction discriminating device capable of discriminating an out of phase contraction after discriminating between a measurement abnormal state and a normal measurement state.The present invention relates to an evaluation target QRS group determining means (S3) for determining an evaluation target QRS group which is an object to be evaluated based on the measurement state of R waves obtained from the electrocardiogram data, and the QRS group to be evaluated as an object to be evaluated, and adjacent QR temporally adjacent to the evaluation target QRS group. It is an extrasystole contraction discriminating device having an extratropical contraction candidate determining means (S5) for judging whether or not the evaluation target QRS group is an extrasystole contraction candidate based on the s group.Diagram【課題】 計測異常状態と、正常計測状態とを判別した上で、期外収縮を判別することがでできる期外収縮判別装置を提供する。【解決手段】 本発明は、心電データから得られるR波の計測状態に基づいて、評価対象となる評価対象QRS群を決定する評価対象QRS群決定手段(S3)と、前記評価対象となる評価対象QRS群を、前記評価対象QRS群に時間的に隣り合う隣接QRS群に基づいて、前記評価対象QRS群が期外収縮候補であるかを判定する期外収縮候補判定手段(S5)とを具備する期外収縮判別装置、である。【選択図】 図2
