Immunoaffinity purification was performed on human mesothelioma cell lines NCI-H2452, NCI-H28, MSTO-211H and JL1, on murine mesothelioma cell line AB12, as well as on mesothelioma samples from two patients (including tumor and benign tissues). Thereafter Immunopeptidomics by Mass Spectrometry on a Tims TOF Pro revealed the MHC peptide landscape of mesothelioma.