Provided is an information acquiring apparatus having: an information generating unit generating image data based on signals derived from photoacoustic waves and a display displaying an image based on the image data, wherein the information generating unit generates first image data based on the signals output from part of a plurality of elements before completing light irradiation, the display displays an image based on the first image data before completing light irradiation, the information generating unit generates second image data based on the signals output from more elements than the part of the plurality of elements, after completing light irradiation, and the display displays an image based on the second image data.
