A medical instrument (1) is described comprising at least two arms (10-12) suitable for passing from a position of minimum mutual distance to a position of maximum mutual distance between each other, the arm (10-12) comprising at least one prehensile portion (3) comprising a wall (30) pending downwardly along a direction of a vertical axis (Z) and mounting a lighting apparatus (4) which comprises a multiplicity of lighting sources (51-53) disposed along said wall (30), at least one first lighting source (51) is disposed at a height which is more elevated with respect to at least one second lighting source (52), said multiplicity of lighting sources (51-53) emit a multiplicity of light beams directed along a multiplicity of mutually diverging axes (H, M, L).
