To date, some types of Optically Reconfigurable Gate Arrays (ORGAs) have been developed to realize capabilities of rapid reconfiguration with numerous reconfiguration contexts. However, the layout style requires a shield against the reconfiguration light irradiation to guard transistors that constitute the gate array. This paper presents a shield effect for a circuit that is implemented on a gate array. Finally, experimental results are shown for an ORGA-VLSI chip with the shield design.