An imaging device comprising: an image sensor that has an imaging surface on which a plurality of pixels are two-dimensionally arranged and that generates image data from a subject image formed on the imaging surface; and an optical system (11, 11b) that forms the subject image in a predetermined range of a vertical view angle (V1, V2, V3) and in a predetermined range of a horizontal view angle (H1, H2, H3) on the imaging surface, wherein a number of pixels used for capturing the subject image included in a unit view angle is defined as resolution, the imaging surface includes a first region (R11, R12, R13) and a second region different from the first region (R11, R12, R13), the optical system (11, 11b) forms the subject image on the imaging surface so as to cause resolution of a first subject image of the subject image in the first region (R11, R12, R13) to be higher than resolution of a second subject image of the subject image in the second region, the imaging surface includes a third region (R11, R12, R13) different from the first region (R11, R12, R13) and the second region, the optical system (11, 11b) forms the subject image on the imaging surface so as to cause resolution of a third subject image of the subject image in the third region (R11, R12, R13) to be higher than the resolution of the second subject image, and the region between the first region (R11, R12, R13) and the third region (R11, R12, R13) is formed by the second region, wherein the third region (R11, R12, R13) is separated from the first region (R11, R12, R13), and each of the first region (R11, R12, R13) and the third region (R11, R12, R13) is asymmetric with respect to a horizontal line that passes through a center of the vertical view angle (V1, V2, V3) and the horizontal view angle (H1, H2, H3). an image sensor that has an imaging surface on which a plurality of pixels are two-dimensionally arranged and that generates image data from a subject image formed on the imaging surface; and an optical system (11, 11b) that forms the subject image in a predetermined range of a vertical view angle (V1, V2, V3) and in a predetermined range of a horizontal view angle (H1, H2, H3) on the imaging surface, wherein a number of pixels used for capturing the subject image included in a unit view angle is defined as resolution, the imaging surface includes a first region (R11, R12, R13) and a second region different from the first region (R11, R12, R13), the optical system (11, 11b) forms the subject image on the imaging surface so as to cause resolution of a first subject image of the subject image in the first region (R11, R12, R13) to be higher than resolution of a second subject image of the subject image in the second region, the imaging surface includes a third region (R11, R12, R13) different from the first region (R11, R12, R13) and the second region, the optical system (11, 11b) forms the subject image on the imaging surface so as to cause resolution of a third subject image of the subject image in the third region (R11, R12, R13) to be higher than the resolution of the second subject image, and the region between the first region (R11, R12, R13) and the third region (R11, R12, R13) is formed by the second region, wherein the third region (R11, R12, R13) is separated from the first region (R11, R12, R13), and each of the first region (R11, R12, R13) and the third region (R11, R12, R13) is asymmetric with respect to a horizontal line that passes through a center of the vertical view angle (V1, V2, V3) and the horizontal view angle (H1, H2, H3).