In an anti-vibration device having a partition member dividing a fluid-sealed
chamber into upside and downside, aimed at enhancing the anti-vibration performance
by preventing unwanted leak of the fluid through through-holes of the partition
member. To that end, the partition member is constructed of an elastic membrane
partitioning the fluid-sealed chamber, and a pair of grids limiting displacements
of the elastic membrane; and the elastic membrane is provided at its either surface
with projecting streaks integral therewith, the projecting streaks surrounding
through-holes, defined by the grids, over their whole peripheries and abutting
on the grids, thereby regulating the flow of fluid among adjacent through-holes.
