Provided is a mobile terminal testing apparatus capable of executing a test for putting any pseudo base station out of service during state transition, such as during handover or during position registration. A mobile terminal testing apparatus includes a plurality of pseudo base station units 18-1, 18-2, and 18-3 that simulate a plurality of base stations, and a scenario processing unit 17 that controls the pseudo base station units 18-1, 18-2, and 18-3 in compliance with a set scenario to execute a test. The scenario processing unit 17 puts the pseudo base station units 18-1, 18-2, and 18-3 set as a base station executing an out-of-service test out of service in a case where a message set as a message to execute the out-of-service test is transmitted from the pseudo base station units 18-1, 18-2, and 18-3 set as a base station transmitting the message to execute the out-of-service test.