In this paper,by applying upper and lower solution method,we study the existence of solution of fractional-order multiple-point boundary value problem x^(δ)(t),=f(t,x(t)),t∈[a,b],a>0, x(a)+∑{k=1}^{m}a_{k}x(t_{k})=c where f:[a,b]×R→R is L^(1)-Caratheodory function,δ∈(0,1],c∈R,t_{k}(k=1,2,...,m) are constants and satisfying a0.
