Infusion kit (1) comprising, in combination: a butterfly needle (2) formed by a stiff rod-shaped body (4), at least a pair of coplanar wings (5) laterally and outwardly extending from said body along the axis (AA) of the body (4), a cavity (4A) is adapted to receive a slide (6), supporting a sliding needle (7) from which an element (17) projects and engages a straight groove (4A) made along the body (4) said element (17) being longer than the cavity (4A) in order to project from the body (4), is insertable in a housing (4B) connected to the groove (4A) in order to compressibly block a spring (8) between the slide (6) and a bottom wall (4C) of the body (4) cavity an infusion cannula (3) comprising a central and hollow cylinder (14), a flexible element (18) made of rubber or other material, at least a coupling (15) having an inner passage (16) the flexible element (18) and the passage (16) communicating by the cylinder (14) cavity in order to allow to drain a fluid or the supply from the outside said flexible element (18) is hollow and through said cavity the needle (7) of the butterfly needle (2) can be inserted at least a pair of coplanar wings (12) extend from said cylinder. Said needle (2) and said cannula (3) can be connected by anti-rotational mechanical coupling means (10, 10A, 11, HA), so that to have, in a first step, the possibility of inserting the cannula by the needle which is located inside and projecting from the same and then of removing the butterfly needle by keeping in position the cannula.La présente invention concerne un kit de perfusion (1) qui comprend, en combinaison : une aiguille à ailettes (2) formée par un corps rigide en forme de tige (4), au moins une paire dailes coplanaires (5) sétendant latéralement et vers lextérieur depuis ledit corps le long de laxe (AA) du corps (4), une cavité (4A) est adaptée pour recevoir une glissière (6), supportant une aiguille coulissante (7) de laquelle un élément (17) se projette et se met en prise avec u
