Abstract: Support base for supporting accessories on the flexible wall of an inflatable body and an pneumatic boat fitted therewith. A mounting base (10) intended for the fixing of an accessory onto the flexible wall of an inflatable body, such as an inflatable buoyancy fender of an inflatable boat, characterized in that it includes a stack (11) of several layers of flexible material fixed one to the other and passed through by at least one fitting (16) appropriate to the fixing of the aforesaid accessory, the aforesaid mounting base being fixable to the inflatable body flexible wall, the number of layers of the stack being determined so that the thickness of the stack corresponds approximately to the height of an anchoring part of the fitting.