A photoacoustic apparatus comprising: a light irradiation unit; a plurality of transducers configured to receive acoustic waves generated through irradiation of a subject with light emitted from the light irradiation unit and output a group of reception signals; a supporting member configured to support the plurality of transducers such that directional axes of at least some of the plurality of transducers converge; a driving unit configured to move at least one of the supporting member and the subject; a first memory configured to store the group of reception signals output from the plurality of transducers; and a processing unit configured to obtain subject information at a target position of the subject, wherein: the light irradiation unit irradiates the subject with light a plurality of times, the driving unit moves the supporting member so that relative positions of the supporting member and the subject differ at each of the plurality of times of light irradiation, and the plurality of transducers receive acoustic waves generated through the plurality of times of light irradiation and output a plurality of groups of reception signals corresponding to the plurality of times of light irradiation, the first memory stores the plurality of groups of reception signals, characterized in that the processing unit obtains the subject information at the target position by assigning, to each of the plurality of groups of reception signals stored in the first memory, a weight corresponding to relative positions of the supporting member and the target position, wherein the processing unit assigns, to each reception signal included in a group of reception signals, a uniform weight corresponding to the relative positions of the supporting member and the target position. a light irradiation unit; a plurality of transducers configured to receive acoustic waves generated through irradiation of a subject with light emitted from the light irradiation unit and output a group of reception signals; a supporting member configured to support the plurality of transducers such that directional axes of at least some of the plurality of transducers converge; a driving unit configured to move at least one of the supporting member and the subject; a first memory configured to store the group of reception signals output from the plurality of transducers; and a processing unit configured to obtain subject information at a target position of the subject, wherein: the light irradiation unit irradiates the subject with light a plurality of times, the driving unit moves the supporting member so that relative positions of the supporting member and the subject differ at each of the plurality of times of light irradiation, and the plurality of transducers receive acoustic waves generated through the plurality of times of light irradiation and output a plurality of groups of reception signals corresponding to the plurality of times of light irradiation, the first memory stores the plurality of groups of reception signals, characterized in that the processing unit obtains the subject information at the target position by assigning, to each of the plurality of groups of reception signals stored in the first memory, a weight corresponding to relative positions of the supporting member and the target position, wherein the processing unit assigns, to each reception signal included in a group of reception signals, a uniform weight corresponding to the relative positions of the supporting member and the target position. the light irradiation unit irradiates the subject with light a plurality of times, the driving unit moves the supporting member so that relative positions of the supporting member and the subject differ at each of the plurality of times of light irradiation, and the plurality of transducers receive acoustic waves generated through the plurality of times of light irradiation and output a plurality of groups of reception signals corresponding to the plurality of times of light irradiation, the first memory stores the plurality of groups of reception signals,