Abstract. The series of some new estimates for the sums of the typeis obtained. Here q is a sufficiently large integer, √ q(log q) x q, a, b are integers, (a, q) = 1, e q (v) = e 2πiv/q , f (n) is a multiplicative function, nn * ≡ 1 (mod q) and the prime sign means that (n, q) = 1. These estimates improve the previous results of such type belonging to K. Gong and C. Jia.