To acquire a pasted image having an enlarged dynamic range and having a high quality and a high angle of view, an image acquisition apparatus includes an imaging unit that captures an object, to acquire an image, an imaging control unit that controls the imaging unit, an HDR processing unit that combines a plurality of partial images acquired by capturing the same region of the object under different exposures, to generate an HDR image having an enlarged dynamic range, a pasting processing unit that pastes the plurality of HDR images generated for different regions of the object, to acquire a pasted image having a higher angle of view, and an exposure setting unit that sets an exposure condition in capturing all the partial images based on image information acquired by capturing a wider range than the single partial image included in the pasted image.