To provide a more favorable and more permanent friction-reducing device to facilitate the relative movements of strings of a sport racket, at the crossed points of the strings under an impact force from every angle.

This friction-reducing element is to be inserted in a space between contact points of strings for a sport racket, and contains a composite article of a reinforcing material, wherein at least one surface is covered with a polymer film. In this case, the composite article is formed in a manner to be adaptable to the shape of the string.