Electronic Journal of Differential Equations, Vol. 2009(2009), No. 09, pp. 1-9. Title: Exponential attractors for a nonclassical diffusion equation Authors: Yong-Feng Liu (Northwest Normal Univ., Lanzhou, Gansu, China) Qiaozhen Ma (Northwest Normal Univ., Lanzhou, Gansu, China) Abstract: In this article, we prove the existence of exponential attractors for a nonclassical diffusion equation in ${H^{2}(\Omega)}\cap{H}^{1}_{0}(\Omega)$ when the space dimension is less than 4. Submitted October 22, 2008. Published January 09, 2009. Math Subject Classifications: 35B41, 35Q35. Key Words: Nonclassical diffusion equation; exponential attractors.