Electronic Journal of Differential Equations, Vol. 2010(2010), No. 134, pp. 1-16. Title: Asymptotic behaviour for a diffusion equation governed by nonlocal interactions Author: Armel Andami Ovono (L.A.M.F.A CNRS, France) Abstract: In this article, we study the asymptotic behaviour of a nonlocal nonlinear parabolic equation governed by a parameter. After giving the existence of unique branch of solutions composed by stable solutions in stationary case, we gives for the parabolic problem $L^\infty$ estimates of solution based on using the Moser iterations and existence of global attractor. We finish our study by the issue of asymptotic behaviour in some cases when $t\to \infty$. Submitted March 9, 2010. Published September 20, 2010. Math Subject Classifications: 35B35, 35B40, 35B51. Key Words: Comparison principle; nonlocal diffusion; branch of solutions; asymptotic behaviour.