A subject information acquisition apparatus according to the present invention includes multiple first conversion elements (101) which receive photoacoustic waves. A direction in which reception sensitivity is highest differs between a first part of the first conversion elements (101), and a second part of the first conversion elements (101) which is different from the first part of the first conversion elements (101). Both are disposed on the supporting member (100) with the direction in which reception sensitivity is highest each facing toward a predetermined region. Also included is a plurality of second conversion elements (102) which are different from the first conversion elements (101) and which transmit acoustic waves to the subject (103) and each receive reflection waves reflected within the subject (103).
