A probe includes a plurality of element groups, the element group including a first element and a plurality of second elements which are arranged in a first direction, the plurality of element groups being arranged in a second direction intersecting with the first direction. An acoustic lens having a curvature in the first direction is arranged on the first element. When transmission and reception based on a pulse echo technique are performed, the transmission and reception are performed with respect to the subject by using only the first element, and when reception of a photoacoustic wave is performed, the reception from the subject is performed by using the entire element group constituted by the first element and the plurality of second elements.
