The invention provides an imaging device which can improve image quality of a captured image upon proximity imaging. An image processing unit (14) subjects the image data D1 captured by an imaging element (13) to a cut-out process of a center region (31) and an image inversion process for each of the micro lens imaging regions (3) and then to an image synthesis process of respective images so as to generate image processing data (imaging data D2). Since in the imaging data D2, the cut-out process of the center region (31) is performed for each of the micro lens imaging regions (3), it is possible to eliminate an overlap region (32) between imaging regions (3) of the adjacent micro lenses even when a biological body (2) as an imaging object is in the proximity. It should be noted that the range of the center region (31) may be a preset fixed value or may be modified in accordance with a distance between the imaging object (biological body) (2) and a micro lens array (12).