This invention relates to a cutting device for sugar cane harvesters that includes several support discs, to which are fixed several radial cutters using fixing bolts, characterised in that the radial cutters (3) have several through-slots (6) that include a larger section enabling the passage of the head of the fixing bolts (4) and at least one narrower section that does not allow the passage of the head of the bolts (4), and into which are inserted the fixing bolts (4), said head of the bolts (4) being placed in line with the narrowest sections of the slots when the radial cutters (3) are in the active working position, in which case the head of such bolts (4) presses against the free face of the radial cutters (3) in zones adjacent to the narrowest sections of the through-slots (6).
