  In this paper, we investigate the P\'olya-Knopp type inequality for Sugeno
integrals in two cases. In the first case, we suppose that the inner integral
is the standard Riemann integral and the remaining two integrals are of Sugeno
type. In the second case, all involved integrals are Sugeno integral. We
present several examples illustrating the validity of our theorems. Finally, we
prove a Hardy-Knopp type inequality for Sugeno integral.
