A balloon device for a visible puncture. A puncture needle tube (4) is inserted into an axial through hole of a sleeve (2). An imaging channel (6) allowing an imaging device (5) to pass through is formed in the puncture needle tube (4). The balloon (1) is provided with connecting holes at both axial ends thereof. One end of the balloon (1) is fixed to the outer wall of the front end of the puncture needle tube (4), and the wall of the connecting hole at the other end of the balloon (1) is fixed on the outer wall of the front end of the sleeve (2). The rear end of the sleeve (2) closely fits the outer wall of the puncture needle tube (4). A fluid medium passage (12) allowing a fluid medium to flow through is formed between the outer wall of the puncture needle tube (4) and the inner wall of the balloon (1) and between the outer wall of the puncture needle tube (4) and the inner wall of the sleeve (2). The fluid medium passage (12) formed between the inner wall of the sleeve (2) and the outer wall of the puncture needle tube (4) is connected to a fluid medium injection tube (11). The front end of the puncture needle tube (4) is a conical head. The puncture needle tube (4) is combined with the balloon (1), and by means of a built-in or external imaging device (5), the position of the balloon device in puncturing of the collecting duct system of a kidney can be clearly observed, such that puncturing is accurate, and puncture and balloon expansion can be completed with the same device without the need for multiple punctures.L'invention concerne un dispositif à ballonnet pour une ponction visible. Un tube d'aiguille de ponction (4) est inséré dans un trou traversant axial d'un manchon (2). Un canal d'imagerie (6) permettant à un dispositif d'imagerie (5) de passer à travers est formé dans le tube d'aiguille de ponction (4). Le ballonnet (1) est pourvu de trous de liaison aux deux extrémités axiales de celui-ci. Une extrémité du ballonnet (1) est fixée à la paroi externe d
