Disclosed are a probe apparatus, a medical instrument having the same, and a method of controlling the probe apparatus, in which a medical probe apparatus includes a main body and a head which is detachably provided in the main body, and includes a transducer array configured to output an ultrasound for diagnosis of an object, the main body including: a transceiver configured to transmit and receive a signal to and from the transducer array through a plurality of channels and at least one processor configured to control the transceiver to transmit a predetermined test signal to the transducer array of the head mounted to the main body, determine a probe type corresponding to the transducer array of the mounted head based on a feedback signal received through the transceiver in response to the test signal, and make the probe apparatus operate corresponding to the determined probe type. Thus, a transducer having various shapes is selectively mounted to an ultrasound probe, and an operation automatically optimized to the mounted probe type is possible without additional parts or costs.
