Abstract: A cross-country ski binding for locking a shoe (11) on a cross-country or touring ski (12), the shoe (11) being allowed to pivot relative to an axis (13) which is normal to the longitudinal axis of the ski, in which the front end (14) of the shoe (11) is provided with pivoting means which are complementary to pivoting means of the binding (10), the binding comprising a flexor (15) acting between the front end (14) of the shoe and the binding (10) or ski (12), respectively, said flexor exerting a reaction force on the shoe (11) as the heel of the shoe is lifted off the top of the ski (12). The flexor (15) includes at least two flexor portions (16, 17), one (17) of said flexor portions being made of soft-elastic material while the other one (16) is made of hard-elastic material.