A piezoelectric valve in which the valve is opened/closed utilizing a displacement of a laminated piezoelectric element (1, 32), 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 (1, 32) 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 (1, 32) to be acted on the valving element, the actuator being disposed in the valve main body, wherein: a surface of the laminated piezoelectric element (1, 32) is coated with silicone in a state in which the laminated piezoelectric element (1, 32) 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 (1, 32) 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 (1, 32); characterized in that the surface of the laminated piezoelectric element (1, 32) is coated with silicone filled between a pair of projecting pieces positioned on both sides of the laminated piezoelectric element (1, 32) along a longitudinal direction of the laminated piezoelectric element (1, 32) 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 (1, 32) 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 (1, 32) to be acted on the valving element, the actuator being disposed in the valve main body, wherein: a surface of the laminated piezoelectric element (1, 32) is coated with silicone in a state in which the laminated piezoelectric element (1, 32) 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 (1, 32) 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 (1, 32); characterized in that the surface of the laminated piezoelectric element (1, 32) is coated with silicone filled between a pair of projecting pieces positioned on both sides of the laminated piezoelectric element (1, 32) along a longitudinal direction of the laminated piezoelectric element (1, 32) with gaps between the pair of projecting pieces. a surface of the laminated piezoelectric element (1, 32) is coated with silicone in a state in which the laminated piezoelectric element (1, 32) 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 (1, 32) 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 (1, 32); characterized in that the surface of the laminated piezoelectric element (1, 32) is coated with silicone filled between a pair of projecting pieces positioned on both sides of the laminated piezoelectric element (1, 32) along a longitudinal direction of the laminated piezoelectric element (1, 32) with gaps between the pair of projecting pieces.