Abstract: Disclosed is a catheterization robot including: several tracks for longitudinal horizontal rectilinear translational movement of several flexible elongate medical elements, the tracks being parallel to each other; a drive component for driving a flexible elongate medical device in rectilinear translation, the drive component being common to the tracks, transversely horizontally movable, and surrounded by a sealing ring which is deformable and integrally secured to the drive component; a sealing belt which is transversely horizontally movable, is integrally secured to the periphery of the sealing ring, and of which two portions extend the sealing ring transversely horizontally, respectively on the two sides, sufficiently to ensure that all of the tracks remain continuously covered.