An imaging device (10, 102, 103) comprising: a lens barrel that holds at least one optical element; and a light-receiving circuit (50, 502) that at least has an image sensor (52, 522) that obtains an image of a photographic subject formed by the optical element and a drive substrate that drives the image sensor; characterised by a welding structure in which the lens barrel and the light-receiving circuit are joined indirectly by welding, in a state where a positional relationship between the image sensor and the optical element optically positioned is maintained, wherein the welding structure has a plurality of intermediate holders (54, 543) each comprising a contact part (54d, 543d) on a lens barrel side in contact with a contact portion of the lens barrel and a contact part (54f, 543f) on a light-receiving circuit side in contact with a contact portion (51a, 522a) of the light-receiving circuit; a welded part on the lens barrel side that has been hardened after the contact portion of the lens barrel or the contact part on the lens barrel side has been softened, where the contact portion of the lens barrel and the contact part on the lens barrel side are fixed; and a welded part on the light-receiving circuit side that has been hardened after the contact portion of the light-receiving circuit or the contact part on the light-receiving circuit side has been softened, where the contact portion of the light-receiving circuit and the contact part on the light-receiving circuit side are fixed; and the imaging device (10, 102, 103) further comprises a strengthened adhesive layer that is provided to bridge the lens barrel and the light-receiving circuit after the welding structure has been formed. a lens barrel that holds at least one optical element; and a light-receiving circuit (50, 502) that at least has an image sensor (52, 522) that obtains an image of a photographic subject formed by the optical element and a drive substrate that drives the image sensor; characterised by a welding structure in which the lens barrel and the light-receiving circuit are joined indirectly by welding, in a state where a positional relationship between the image sensor and the optical element optically positioned is maintained, wherein the welding structure has a plurality of intermediate holders (54, 543) each comprising a contact part (54d, 543d) on a lens barrel side in contact with a contact portion of the lens barrel and a contact part (54f, 543f) on a light-receiving circuit side in contact with a contact portion (51a, 522a) of the light-receiving circuit; a welded part on the lens barrel side that has been hardened after the contact portion of the lens barrel or the contact part on the lens barrel side has been softened, where the contact portion of the lens barrel and the contact part on the lens barrel side are fixed; and a welded part on the light-receiving circuit side that has been hardened after the contact portion of the light-receiving circuit or the contact part on the light-receiving circuit side has been softened, where the contact portion of the light-receiving circuit and the contact part on the light-receiving circuit side are fixed; and the imaging device (10, 102, 103) further comprises a strengthened adhesive layer that is provided to bridge the lens barrel and the light-receiving circuit after the welding structure has been formed.