To facilitate assembly of a movable member and furthermore to reduce cost, while obtaining aimed function of vibrational absorption is obtained in a liquid-sealed mount device A formed with a connecting metal fitting 3, a received pressure chamber 18a and a balanced chamber 18b in the interior and arranging the movable member of an orifice board 15 to be easily built, between the received pressure chamber 18a and the balanced chamber 18b.

A center hole 20a and round holes 20c are formed on a base part 20 of the orifice board 15. The movable member is configured as a rubber elastic plate 24 which a membrane-like body part 24a including a thick part 24b in outer periphery and a connecting shaft 24c projecting from its center are integrally molded, and the connecting shaft 24c is inserted through the central hole 20 of the orifice board 15 and simultaneously enabling the thick part 24b in the outer periphery to be penetrated and abutted against the basic part 20 of the orifice board 15 and forming clearance of predefined distance between the body part 24a and the base part. The device are locked surely by a sticking part 20b, provided around peripheral edge of the center hole 20a on the orifice board 15, by providing it with an arrowhead-shaped hook part 24d on the tip of the connecting shaft 24c.