FIG. 12A is a plan view showing a twelfth embodiment of the solid state image pick-up element according to the invention, and FIG. 12B is a cross sectional view cut along X-X' of the embodiment shown in FIG. 12A. In this embodiment, the solid state image pick-up element 91 has a similar construction to that of the IGLT 81 shown in the eleventh embodiment, and the gate region arranged in the cut-ou