An image sensor includes: a light reception unit； first transfer lines； a constant current source； second transfer lines； a reading unit； a control unit； a dielectric interposed between the first and second transfer lines formed in pairs； a first chip including at least the light reception unit, the plurality of first transfer lines, and the constant current source, each being mounted on the first chip； and a second chip including at least the second transfer lines mounted on the second chip. The first chip is configured such that the second chip is stacked on a back surface of a light receiving surface of the light reception unit, and each of the second transfer lines is arranged at a position facing one of the first transfer lines with the dielectric interposed between the first and second transfer lines.
