Electronic Journal of Differential Equations, Vol. 2009(2009), No. 26, pp. 1-15. Title: Solutions to boundary-value problems for nonlinear differential equations of fractional order Authors: Xinwei Su (Univ. of Mining and Technology, Beijing, China) Shuqin Zhang (Univ. of Mining and Technology, Beijing, China) Abstract: we discuss the existence, uniqueness and continuous dependence of solutions for a boundary value problem of nonlinear fractional differential equation. Submitted June 25, 2008. Published February 03, 2009. Math Subject Classifications: 34B05, 26A33. Key Words: Boundary value problem; fractional derivative; fixed-point theorem; Green's function; existence and uniqueness; continuous dependence.