An imaging mass spectrometer includes: a storage configured to acquire and store data constituting a first imaging graphic indicating an ion intensity distribution in a specific one or plurality of m/z or m/z ranges based on data obtained by mass spectrometry for a sample; a Raman imaging data acquisition unit configured to acquire and store data constituting one or plurality of second imaging graphics obtained by Raman analysis that is a type different from mass spectrometry for the sample; a signal intensity normalization processor configured to perform data conversion processing of normalizing signal intensity in one or plurality of first and second imaging graphics; an adjustment processor configured to perform data processing of aligning spatial resolutions of the one or plurality of first and second imaging graphics; and a statistical analysis processor configured to execute statistical analysis processing on images and to classify the first and second imaging graphics.