There is provided an imaging device manufacturing apparatus, a method for manufacturing an imaging device, and an imaging device that are designed to be capable of increasing the quality of an image to be reconstructed by a lensless camera. The lensless camera includes a mask that has a plurality of lenses that transmit and condense incident light in part of a light shielding material, and modulates and transmits the incident light; an imaging element that images the incident light modulated by the mask as a pixel signal; and a signal processing unit that reconstructs the pixel signal as a final image by signal processing, the optical axis directions of the lenses to be disposed in the mask are adjusted so that only the incident light having passed through the mask is condensed and enters the imaging element. The present disclosure can be applied to lensless cameras.