A piezoelectric valve in which the valve is opened/closed utilizing a displacement of a laminated piezoelectric element , comprising: a valve main body having a gas pressure chamber that receives compressed gas supplied externally; and an actuator having a valving element , the laminated piezoelectric element configured to generate a driving force required for operating the valving element as the displacement, a displacement enlarging mechanism that enlarges the displacement of the laminated piezoelectric element to be acted on the valving element , the actuator being disposed in the valve main body , wherein: a surface of the laminated piezoelectric element is coated with silicone in a state in which the laminated piezoelectric element is integrated into the actuator ; the displacement enlarging mechanism is formed of a metallic material, and an interconnection line for supplying power to the laminated piezoelectric element is molded in a plate formed of a resin material; an electrode of the interconnection line exposed from the plate is coated with an insulation material in a state in which the electrode is connected to a lead line of the laminated piezoelectric element ; characterized in that the surface of the laminated piezoelectric element is coated with silicone filled between a pair of projecting pieces positioned on both sides of the laminated piezoelectric element along a longitudinal direction of the laminated piezoelectric element with gaps between the pair of projecting pieces . a valve main body having a gas pressure chamber that receives compressed gas supplied externally; and an actuator having a valving element , the laminated piezoelectric element configured to generate a driving force required for operating the valving element as the displacement, a displacement enlarging mechanism that enlarges the displacement of the laminated piezoelectric element to be acted on the valving element , the actuator being disposed in the valve main body , wherein: a surface of the laminated piezoelectric element is coated with silicone in a state in which the laminated piezoelectric element is integrated into the actuator ; the displacement enlarging mechanism is formed of a metallic material, and an interconnection line for supplying power to the laminated piezoelectric element is molded in a plate formed of a resin material; an electrode of the interconnection line exposed from the plate is coated with an insulation material in a state in which the electrode is connected to a lead line of the laminated piezoelectric element ; characterized in that the surface of the laminated piezoelectric element is coated with silicone filled between a pair of projecting pieces positioned on both sides of the laminated piezoelectric element along a longitudinal direction of the laminated piezoelectric element with gaps between the pair of projecting pieces . a surface of the laminated piezoelectric element is coated with silicone in a state in which the laminated piezoelectric element is integrated into the actuator ; the displacement enlarging mechanism is formed of a metallic material, and an interconnection line for supplying power to the laminated piezoelectric element is molded in a plate formed of a resin material; an electrode of the interconnection line exposed from the plate is coated with an insulation material in a state in which the electrode is connected to a lead line of the laminated piezoelectric element ; characterized in that the surface of the laminated piezoelectric element is coated with silicone filled between a pair of projecting pieces positioned on both sides of the laminated piezoelectric element along a longitudinal direction of the laminated piezoelectric element with gaps between the pair of projecting pieces . <EOS>