An ultrasound diagnostic apparatus comprising: an ultrasound probe; and an apparatus main body that is wirelessly connected to the ultrasound probe, wherein the ultrasound probe includes an ultrasound unit that acquires ultrasound image data by transmitting and receiving ultrasound waves, a plurality of probe-side communication circuits each of which performs wireless communication with the apparatus main body and which have transmission capacities different from each other and power consumptions different from each other, and a power supply controller that selects one probe-side communication circuit among the plurality of probe-side communication circuits according to a power supply mode of the ultrasound probe and performs wireless communication with the apparatus main body by using the selected probe-side communication circuit, the power supply mode of the ultrasound probe includes an active mode in which an operation of the ultrasound unit is enabled and a standby mode in which an operation of the ultrasound unit is disabled and a power consumption is lower than a power consumption in the active mode, and the power supply controller switches the power supply mode from the standby mode to the active mode in a case where the ultrasound probe receives an activation control signal from the apparatus main body, characterized in that the plurality of probe-side communication circuits include: a probe-side first communication circuit that is selected by the power supply controller and transmits the ultrasound image data acquired by the ultrasound unit to the apparatus main body in a case where the power supply mode is the active mode, and a probe-side second communication circuit that is selected by the power supply controller and operates with a power consumption lower than a power consumption of the probe-side first communication circuit in a case where the power supply mode is the standby mode. an ultrasound probe; and an apparatus main body that is wirelessly connected to the ultrasound probe, wherein the ultrasound probe includes an ultrasound unit that acquires ultrasound image data by transmitting and receiving ultrasound waves, a plurality of probe-side communication circuits each of which performs wireless communication with the apparatus main body and which have transmission capacities different from each other and power consumptions different from each other, and a power supply controller that selects one probe-side communication circuit among the plurality of probe-side communication circuits according to a power supply mode of the ultrasound probe and performs wireless communication with the apparatus main body by using the selected probe-side communication circuit, an ultrasound unit that acquires ultrasound image data by transmitting and receiving ultrasound waves, a plurality of probe-side communication circuits each of which performs wireless communication with the apparatus main body and which have transmission capacities different from each other and power consumptions different from each other, and a power supply controller that selects one probe-side communication circuit among the plurality of probe-side communication circuits according to a power supply mode of the ultrasound probe and performs wireless communication with the apparatus main body by using the selected probe-side communication circuit, the power supply mode of the ultrasound probe includes an active mode in which an operation of the ultrasound unit is enabled and a standby mode in which an operation of the ultrasound unit is disabled and a power consumption is lower than a power consumption in the active mode, and the power supply controller switches the power supply mode from the standby mode to the active mode in a case where the ultrasound probe receives an activation control signal from the apparatus main body, characterized in that the plurality of probe-side communication circuits include: a probe-side first communication circuit that is selected by the power supply controller and transmits the ultrasound image data acquired by the ultrasound unit to the apparatus main body in a case where the power supply mode is the active mode, and a probe-side second communication circuit that is selected by the power supply controller and operates with a power consumption lower than a power consumption of the probe-side first communication circuit in a case where the power supply mode is the standby mode. a probe-side first communication circuit that is selected by the power supply controller and transmits the ultrasound image data acquired by the ultrasound unit to the apparatus main body in a case where the power supply mode is the active mode, and a probe-side second communication circuit that is selected by the power supply controller and operates with a power consumption lower than a power consumption of the probe-side first communication circuit in a case where the power supply mode is the standby mode.