Provided is an ultrasound diagnostic apparatus permitting interchange of transducer arrays to select one having an appropriate frequency band for an intended diagnosis purpose, while achieving reduction in dimensions and improvement in ease of operation. An ultrasound probe 1 includes a middle unit 4 connected to a back unit 2 by wireless communication, and a front unit 3 detachably connected to the middle unit 4 through a connector 5. The front unit 3 incorporates a transducer array 6 having a specific frequency band, a preamplifier 8 having a frequency band corresponding to the frequency band of the transducer array 6, and a transmission driver 9 that outputs a drive voltage corresponding to the drive voltage for the transducer array 6. The front unit 3, the middle unit 4 and the back unit 2 respectively have dedicated CPUs 10, 15 and 20 for controlling the components in the respective units.
