The present invention relates to a surgical anchor device (1) suitable for being anchored on the mucous membrane of the inner wall of the intestine (10), the device comprising a temporary anchor element (2) presenting anchoring that can be modified in controlled manner and comprising a first substantially cylindrical multiply-perforated wall presenting properties of radial elasticity whereby said first wall presents an outer diameter that can be varied in controlled manner, the device being characterized in that at least a portion of the inner surface of said first wall (2a) is lined with an independent leakproof inner sheath having only its longitudinal ends (3a, 3b) fastened to said anchor element (2) in such a manner as to define a suction chamber (5) between said inner sheath (3) and said first wall, said temporary anchor element (2) being coupled to a flexible or semi-rigid tube referred to as an &ldquoinjection-suction&rdquo tube (6), extending outside said anchor element (2), an open end (6a) of said injection-suction tube opening out into said suction chamber (5) enabling air to be injected into or sucked out from said suction chamber.
