An ultrasound probe diagnosing apparatus (100) which diagnoses an ultrasound probe (200) having an array of a plurality of ultrasound transducing elements (202a) on the basis of how the ultrasound probe (200) receives reflected ultrasound waves from a test object placed to face the ultrasound probe (200), includes a part (111) which detects a posture of the ultrasound probe (200) with respect to the test object by comparing reflected ultrasound signals received by at least some of the plurality of ultrasound transducing elements (202a), and a presenting part (110) which presents information based on the detected posture.