Electronic Journal of Differential Equations, Vol. 2007(2007), No. 21, pp. 1-10. Title: Existence of solutions for a second order abstract functional differential equation with state-dependent delay Author: Eduardo Hernandez (Univ. de Sao Paulo, Brazil) Abstract: In this paper we study the existence of mild solutions for abstract partial functional differential equation with state-dependent delay. Submitted November 27, 2006. Published February 4, 2007. Math Subject Classifications: 47D09, 34K30. Key Words: Abstract Cauchy problem; cosine function; unbounded delay, state-dependent delay.