This paper concerned with study the existence and uniqueness of solutions for
 a class of fractional differential equations with boundary conditions
 involving the Riesz-Caputo type fractional derivatives. We apply the methods
 of functional analysis such that the uniqueness result is established using
 the Banach contraction principle, whereas existence results are obtained using
 Schaefer's and Krasnoslkii's fixed theorems. Some examples are given to
 illustrate our acquired results.