Imaging mass spectrometer

An imaging mass spectrometer comprising:

• an analysis executing section configured to execute MSn analysis (n is an integer greater than or equal to 2) for a target component on each of a plurality of micro regions set in a two-dimensional measurement region on a sample or a three-dimensional measurement region in a sample to collect data;
• a product ion extracting section configured to extract a plurality of product ions observed in the sample based on at least a part of the data collected by the analysis executing section;
• a two-dimensional distribution image creating section configured to create a two-dimensional distribution image based on data of precursor ions and two-dimensional distribution images based on data of the plurality of product ions at the time of the MSn analysis;
• and
• a distribution relationship visualization section configured to examine a relationship of the two-dimensional distribution images of the precursor ions and the plurality of product ions, create a figure or a graph indicating an inclusion relationship of the two-dimensional distribution images, and display the figure or the graph on a display unit.