A chromatographic analyzer is provided for facilitating curve filling by
the linear least-square method for a chromatogram that contains a
plurality of overlapping peaks. A chromatographic data processor executes
fitting processing to each peak in an arbitrary time region having the
plurality of peaks of the chromatogram starting from the front or back
side of time region and the processed peaks are subtracted from the
chromatogram in the time region so that the plurality of peaks in the
chromatogram can be separated from one another.