An image sensor comprising: a sensor substrate including a first pixel configured to sense first wavelength light (L λ1), and a second pixel configured to sense second wavelength light (L λ2); and a color separating lens array provided on the sensor substrate and including a first wavelength light condensing region in which the first wavelength light (L λ1), from incident light (Li), is condensed onto the first pixel, wherein an area of the first wavelength light condensing region is greater than an area of the first pixel, and wherein a distance between the sensor substrate and the color separating lens array is less than a focal distance of the first wavelength light condensing region with respect to the first wavelength light (L λ1), characterized in that: the first pixel includes a plurality of photosensitive cells configured to independently sense the first wavelength light (L λ1) and the second pixel includes a plurality of photosensitive cells configured to independently sense the second wavelength light (L λ2), the distance between the sensor substrate and the color separating lens array is 30% to 70% of the focal distance of the first wavelength light condensing region with respect to the first wavelength light (L λ1), such that a plurality of light concentration portions of the first wavelength light are formed on the first pixel and a plurality of light concentration portions of the second wavelength light are formed on the second pixel. a sensor substrate including a first pixel configured to sense first wavelength light (L λ1), and a second pixel configured to sense second wavelength light (L λ2); and a color separating lens array provided on the sensor substrate and including a first wavelength light condensing region in which the first wavelength light (L λ1), from incident light (Li), is condensed onto the first pixel, wherein an area of the first wavelength light condensing region is greater than an area of the first pixel, and wherein a distance between the sensor substrate and the color separating lens array is less than a focal distance of the first wavelength light condensing region with respect to the first wavelength light (L λ1), characterized in that: the first pixel includes a plurality of photosensitive cells configured to independently sense the first wavelength light (L λ1) and the second pixel includes a plurality of photosensitive cells configured to independently sense the second wavelength light (L λ2), the distance between the sensor substrate and the color separating lens array is 30% to 70% of the focal distance of the first wavelength light condensing region with respect to the first wavelength light (L λ1), such that a plurality of light concentration portions of the first wavelength light are formed on the first pixel and a plurality of light concentration portions of the second wavelength light are formed on the second pixel. the first pixel includes a plurality of photosensitive cells configured to independently sense the first wavelength light (L λ1) and the second pixel includes a plurality of photosensitive cells configured to independently sense the second wavelength light (L λ2), the distance between the sensor substrate and the color separating lens array is 30% to 70% of the focal distance of the first wavelength light condensing region with respect to the first wavelength light (L λ1), such that a plurality of light concentration portions of the first wavelength light are formed on the first pixel and a plurality of light concentration portions of the second wavelength light are formed on the second pixel.