PROBLEM TO BE SOLVED: To provide an electrocardiographic waveform detector capable of detecting a detection object waveform in an ECG signal with a small calculation quantity.SOLUTION: An electrocardiographic waveform detector 1 comprises: a first integration part 20 for calculating a first integral value for a first period of an ECG signal acquired a second integration part 30 for calculating a second integral value for a second period of the ECG signal and a detection part 40 for detecting a specific detection object waveform in the ECG signal by using the first integral value and the second integral value.COPYRIGHT: (C)2016,JPO&INPIT