Abstract: An ultrasonic imaging apparatus is disclosed that is capable of eliminating deterioration of the S/N of the ultrasonic image while suppressing enlargement of the circuit size. The ultrasonic imaging apparatus includes an ultrasonic probe having a plurality of transducers arranged for transmitting and receiving ultrasonic waves to/from an object to be examined. A transmission unit is provided for supplying a drive signal to each of the transducers, and a reception unit is provided for phasing/adding and receiving a reflected echo signal received by each transducer. The apparatus also includes an image processing unit for reconfiguring an ultrasonic image based on the reflected echo signal received. The transmission unit divides the plurality of transducers into a plurality of groups, supplies a common drive signal to the transducers belonging to the same group, and performs focus control by group units.