An electrocardiogram analyzer includes: one set of electrocardiogram measurement electrodes; one or more noise measurement electrode; a measurer which is configured to measure an electrocardiogram signal acquired by the electrocardiogram measurement electrodes, and a noise signal acquired by at least the noise measurement electrode; and an electrocardiogram extraction analyzer which is configured to extract a noise-removed electrocardiogram in which noise is removed, based on the electrocardiogram signal and the noise signal.