Disclosed herein is an ultrasonic probe (1). The ultrasonic probe includes a matching layer (20) having flexibility, a piezoelectric layer (30) disposed on the bottom surface of the matching layer and having flexibility, a first backing layer (41) disposed on the bottom surface of the piezoelectric layer and having flexibility, a second backing layer (43) disposed on the bottom surface of the first backing layer and including a plurality of backing material layers stacked perpendicularly to the first backing layer, and second backing layer adjusting units (71) respectively disposed between every two of the plurality of the stacked backing material layers of the second backing layer and changing the shape of the backing material layers.
