The ultrasonic imaging apparatus of the present invention is provided with a 3-dimensional image construction unit configured to construct a 3-dimensional image using plural ultrasonic tomographic images obtained when the ultrasonic probe is moved in a direction intersecting the direction of the ultrasonic tomographic images; and an ultrasonic probe moving direction setting unit configured to set the moving direction of the ultrasonic probe, using an ultrasonic tomographic image displayed on the screen of the display unit as a reference, in either a first direction which intersects with the direction of the tomographic image or a second direction of opposite orientation to the first direction; wherein the control unit controls the arrangement order of the plural ultrasonic tomographic images in the 3-dimensional image constructed in the 3-dimensional image construction unit according to the moving direction of the ultrasonic probe set by the moving direction setting unit of the ultrasonic probe.