PURPOSE: To provide an image split image pickup device by which color informa tion is obtained with a simple configuration by forming plural images with different spectral characteristics split by an eccentric optical member and a color filter onto a two-dimensional image pickup element.

CONSTITUTION: In an optical system forming a two-dimension image 2 formed by an objective lens 1 onto a two-dimensional image pickup element 4 again by means of an image re-forming lens 3, an eccentric optical member 5 dividing a pupil and each color filter 6 corresponding to each divided pupil are arranged between a position of a two-dimensional image 2 by the objective lens 1 and an image re-forming lens 3. The eccentric optical member 5 divides the aperture of the pupil and is provided with eccentric optical members 5a, 5b and each luminous flux through the divided partial aperture is bent in a different optical path and plural images 8a, 8b are formed to different positions of the two-dimensional images pickup elements 4. Furthermore, each of color filters 6a, 6b with different spectral characteristics are arranged to each partial aperture of the split pupil and plural images 8a, 8b with the different spectral characteristics are formed on the two-dimensional image pickup element 4.