The invention provides a treatment of mesothelioma, especially malignant pleural mesothelioma, using an estrogen receptor β subtype (ERβ) agonist, wherein the treatment comprises administering the ERβ agonist to the patient, and then after a time, t, of up to 24 hours； administering a platinum-containing anti-cancer drug to the patient. The invention also provides an ERβ agonist and a platinum-containing anti-cancer drug for use in the treatment of mesothelioma in a patient, wherein the treatment comprises administering the ERβ agonist to the patient, and then after a time, t, of up to 24 hours, administering the platinum- containing anti-cancer drug to the patient； and a kit comprising a platinum-containing anti- cancer drug and an ERβ agonist.
