In this paper, we investigate the existence of at least one solution to the following higher order Riemann-Liouville fractional differential equation with Riemann-Stieltjes integral boundary condition at resonance:by using Mawhin's coincidence degree theory. Here, D 𝛼 0+ is the standard Riemann-Liouville fractional derivative of order 𝛼, 𝑓 ∶ [0, 1] × R 2 → R, and k) with respect to A. Our choice of k in the boundary condition can be any integer between 0 and n − 1, which supplements many boundary conditions assumed in the literature.Several examples are given to strengthen our result.