Abstract: In a hydraulic antivibratory support intended to be interposed between two rigid elements (1 and 3) and including a work chamber (A) and a compensation chamber (B) separated by a dividing wall (10) and connected permanently together through a restricted passage (11), the whole of these chambers and this passage being filled with liquid, the work chamber is defined outwardly by an annular support wall (7) having the general shape of two hollow and thick truncated cones of opposite directions (7.sub.1, and 7.sub.2) juxtaposed axially by their large bases, their two small bases being connected respectively to the two rigid elements.