An ultrasonic diagnostic apparatus including: an ultrasonic observation device that transmits and receives an ultrasonic wave by an ultrasonic transducer arranged on a tip end of a probe, and that acquires a plurality of two-dimensional ultrasonic tomographic images for a subject in a living body a position data calculator that detects information indicating a reference position of each of the two-dimensional ultrasonic tomographic images and an orientation of a tomographic plane of the each two-dimensional ultrasonic tomographic image and an image processor is provided. The image processor generates a band-shaped longitudinal image including a curved plane along a moving path of the ultrasonic transducer.
