An imaging device according to one embodiment of this disclosure includes: one or more photodetectors that generate a charge by photoelectric conversion depending on the received light intensity; one or more analog digital converting circuits that convert an analog signal read from each of the one or more photodetectors to a digital signal, the one or more analog digital converting circuits being provided for each of the one or more photodetectors; and a plurality of pixel units that include the one or more photodetectors and the one or more analog digital converting circuits, respectively, the plurality of pixel units are disposed so that the one or more photodetectors are adjacent in two pixel units adjacent in a first direction.