Abstract: In this work, we establish the existence and uniqueness of solutions for of nonlinear fractional differential equations with nonlocal boundary conditions. Our results are obtained by using Leray-Schauder nonlinear alternative and Banach contraction principle. To show the applicability of our results, an example is presented at the end

Keywords: Fractional differential equations; existence; nonlocal boundary; Leray-Schauder nonlinear alternative; Banach contraction principle.