The present disclosure relates to an image sensor and an electronic device capable of outputting image data corresponding to frames of a moving image in such a manner that the image data can be reconstructed in temporal order. An image sensor according to a first aspect of the present disclosure includes: a pixel unit configured to generate a pixel signal in response to incident light; an image generating unit configured to generate image data corresponding to frames of a moving image on the basis of the generated pixel signal; a tag information generating unit configured to generate tag information to be embedded into the generated image data; an output unit configured to output the image data having the tag information embedded therein through at least one of first and second logical channels; and a control unit configured to control the pixel unit, the image generating unit, the tag information generating unit, and the output unit to operate in a Slow Movie mode or in a Super Slow Movie mode. The present disclosure is applicable to an electronic device having an imaging function.