A peak assigning apparatus 1 for assigning peaks of a FP configured by peaks and retention time points of the peaks detected from a chromatogram of a multicomponent material, capable of contributing to improvement of the accuracy and efficiency of evaluation of an evaluation target, includes a peak pattern preparing part 7 preparing a peak pattern for each peak of the target FP and a reference FP that comprises n+1 peaks including n peaks being present on at least one of sides located in front and in the rear of each peak in a time axis direction, and a peak assigning part 9 specifying the peaks corresponding to each other by comparison of the peak patterns.