Variable curvature catheter (4), comprising: - a catheter body (8) extending from a proximal end (12) to a distal end (16), the catheter body being provided with a side wall (20) defining at least one cavity (24)； - the catheter body (8), at said distal end (16), comprising a section (28) of variable curvature ending in a tip (32), - in which, inside the cavity (24) of the catheter body (8) is housed at least one pull wire (36) having an ascending branch (40), which extends from the proximal end (12) to the distal end (16) so that it passes at least partially through the section (28) of variable curvature； characterized in that the tensile wire (36) extends from a first fork (44) passing at least partially through the section (28) of variable curvature, leaving the section (28) of variable curvature and rejoining the ascending branch (40) in said first fork (44), so that it forms a closed loop (48) that passes at least partially through the section (28) of variable curvature closing on itself on the first fork (44) , - in which the tensile wire (36), after closing on itself forming a loop (48) on the first fork (44), extends towards the proximal end (12) along a descending branch ( 52), - in which the descending branch (52) slides relative to the ascending branch (40) inside restriction means (64, 68, 72) attached to the ascending branch (40) in said first fork ( 44), said restriction means (64, 68, 72) allowing the relative sliding of the ram to descending (52) in relation to the ascending branch (40) and ensuring the closure of the loop (48) through which the traction wire (36) runs along the section (28) of variable curvature, so that the sliding of the descending branch (52) modifies the curvature of the distal portion of the catheter (4).Catéter (4) de curvatura variable, que comprende: - un cuerpo de catéter (8) que se extiende desde un extremo proximal (12) hasta un extremo distal (16), estando el cuerpo de catéter dotado de una pared lateral (20) que define
