An articular surgical device (20) comprising a surgical tool (22) for modifying a connective tissue of one or both articular surfaces (15, 16) of a bone joint (10), in particular to carry out a treatment such as removal of connective tissue, e.g. damaged cartilage, removal or smoothing of bone tissues. The device comprises a deformable linear element, wherein a positioning means (24) is provided for the tool (22), said positioning means comprising linear or curved elongated elements (23) connected to each other by hinges (25), such that the device (20) is adapted to move through an intra-articular passageway (19) to reach the surgical treatment site (17) between two articular surfaces, said passageway (19) having a determined width (L) and a determined curvature radius (R). The tool (22, 22") can be a mechanical tool such as a barrel-shaped milling cutter (22) or a spherical milling cutter (22"), which may be provided with a pneumatic actuation means or with a turbine hydraulic actuation means. In alternative, The tool may be a laser or an ultrasound tool. A positioning means (24) is provided comprising, for instance, a plurality of tendons (27, 27), and an actuation means arranged at a proximal portion (21 ) of positioning means (24), which is arranged around bone joint (10). The tendons (27, 27) are at least the same number of the elongated elements (23), in order to actuate a respective degree of freedom of each tendon. In particular, a couple of tie-members is provided for each elongated element, which comprises an extension tie-member (27) and a flexion tie-member (37), in order to bilaterally actuate respective opposite extension and flexion movements.La présente invention concerne un dispositif chirurgical articulaire (20) comprenant un outil chirurgical (22) pour modifier un tissu conjonctif de lune ou des deux surfaces articulaires (15, 16) dune articulation osseuse (10), en particulier pour conduire un traitement tel que lablation de tissu conjonctif, par
