A balloon for the removal of biliary tract stones comprises a balloon port (1), a sheath (2) and a balloon (3) the proximal end of the sheath (2) is connected to the balloon port (1) and the balloon (3) is sheathed externally over the distal end of the sheath (2), the sheath (2) being provided with an opening where the balloon (3) is sheathed upon same both end portions of the balloon (3) are fixed to the outer wall of the sheath (2), the effectively fillable portion of said balloon (3) being located between said two ends the effectively fillable portion of said balloon (3) is radially elastic, and the radial dimension (D) of said balloon (3) when filled is greater than the longitudinal dimension (H) thereof when flat. When in use, the present balloon for the removal of biliary tract stones is capable of reducing frictional resistance and is also better adapted to the removal of sandy calculi, thus allowing for shorter surgery times and reduction in patient pain a balloon filling and recovery structure (4) allows for modulation of the recovery speed of the balloon (3) during contraction and recovery, thus resolving problems of excessive recovery speeds of filled balloons.La présente invention concerne un ballonnet permettant déliminer des calculs des voies biliaires qui comprend un orifice (1) de ballonnet, une gaine (2) et un ballonnet (3) lextrémité proximale de la gaine (2) est reliée à lorifice (1) du ballonnet et le ballonnet (3) est gainé extérieurement sur lextrémité distale de la gaine (2), une ouverture étant ménagée dans la gaine (2), le ballonnet (3) étant gainé sur celle-ci les deux parties dextrémité du ballonnet (3) sont fixées à la paroi externe de la gaine (2), la partie dudit ballonnet (3) pouvant être efficacement remplie étant située entre lesdites deux extrémités la partie dudit ballonnet (3) pouvant être efficacement remplie présente une élasticité radiale, et la dimension radiale (D) dudit ballonnet (3) une fois rempli est supérieure à sa di
