The present invention provides a cardiogram waveform correcting and displaying device capable of facilitating visibility of cardiogram waveforms. A first filtering means 58-1 through n th filtering means 58-n are low-cut filters, each having a first cutoff frequency fcl through an n th cutoff frequency fcn respectively. Recognition means 56 recognizes feature values of waveforms related to variation of the waveforms in accordance with any outputs of the first filtering means 58-1 through the n th filtering means 58-n. Judging means 62 selects which of the first through the n th filter is used based on the recognized feature values with the recognition means 56. A filter which restricts base-line variation is used when the base-line variation is large, and a filter having less influence to waveforms is used when the base-line variation is small. Display control means 64 displays on a display portion 65 output of the selected filter.
