. . . "FIG. 13A is a plan view showing a thirteenth embodiment of the solid state image pick-up element according to the invention, and FIG. 13B is a cross sectional view cut along line X-X' of the embodiment shown in FIG. 13B. In this embodiment, the solid state image pick-up element 101 has a similar construction to that of the IGLT 31 shown in the second embodiment (FIGS. 4A and 4B), and a ring-shaped" .