Abstract: An analyzer for a rubber composition includes an acquisition unit, a peak identification unit, and an estimation unit. The acquisition unit acquires data acquired by allowing a rubber composition to undergo component separation and mass separation, the data being plotted in a space defined by a time axis, a signal intensity axis, and a mass component axis. The peak identification unit identities peaks in signal intensity for mass chromatograms corresponding to positions on the mass component axis. The estimation unit estimates at least either of a physical property and an odor degree of the rubber composition based on the peaks identified for the mass chromatograms.