1. An abnormality detecting device for a heart assist device, comprising: a user information acquiring means for obtaining user information that indicates an operation state of the heart assist device implanted in a body of a user or a biological state of the user measured by the heart assist device and associating said user information with time to store in a history information storing means; and an abnormal state judging means for referring said history information storing means and judging whether or not an abnormal state is present based on a history of said user information.