This treatment device (10) for a biological valve includes:an implant (12) having a proximal sleeve (14), deployable between a retracted configuration and a deployed configuration, and comprising a plurality of proximal arms (32) intended to bear on a first face of a leaflet (18) or on an annulus (17) of the valve,a release tool (14) for releasing the implant (12), the implant (12) being mounted in the release tool (14) in its retracted configuration.The device (10) comprises a pushing member (16) for pushing the face of the valve leaflet (18) away from a free end of the proximal arms (32), movable relative to the implant (12) kept in its configuration retracted in the release tool (14) between a withdrawn position and a deployed position pushing the face of the leaflet (18).
