An object information acquiring apparatus includes: a probe that converts an acoustic wave from an object into an electric signal a unit that moves the probe a generating unit that generates a plurality of first image data corresponding to tomographs of the object using a plurality of acoustic signals from respective positions of the object interior, and generates second image data using the plurality of acoustic signals and a display control unit into which the first image data and second image data are input, and which displays on a display unit an image of the object interior, wherein the display control unit displays on the display unit a display based on the first image data, and switches the display when the second image data are input from an identical position of the object.
