A device for supporting a diagnosis of a cancer which provides information useful to decide whether or not an anthracycline anticancer drug should be administered to a cancer patient to be examined is disclosed. Concretely, the device is composed to be able to acquire an activity and an expression of two cyclin dependent kinases (CDK) from a malignant tumor of a cancer patient to be examined, and to acquire a CDK parameters from both of two CDKs. Furthermore the device determines sample data comprising predetermined CDK parameter, and display information of determined sample data. According to the above component, user is easily able to know whether or not a cancer of a cancer patient, whose tumor is similar to the tumor of the cancer patient to be examined, has been recurred in spite of an administration of an anthracycline anticancer drug.