Electronic Journal of Differential Equations, Vol. 2010(2010), No. 71, pp. 1-10. Title: Exponential decay of solutions to a fourth-order viscoelastic evolution equation in R^n Author: Mohammad Kafini (KFUPM-DCC, Dhahran, Saudi Arabia) Abstract: In this article, we consider a Cauchy problem for a viscoelastic wave equation of fourth order. Under suitable conditions on the initial data and the relaxation function, we show that the rate of decay is exponential. Submitted March 3, 2010. Published May 17, 2010. Math Subject Classifications: 35B05, 35L05, 35L15, 35L70. Key Words: Decay; Cauchy problem; relaxation function; viscoelastic.