  We study the cluster mass function and its evolution in different models with
Dark Energy arising from a self--interacting scalar field, with Ratra-Peebles
and SUGRA potentials. Computations are based on a Press & Schechter
approximation. The mass functions we obtain are compared with results holding
for open models or models with Dark Energy due to a cosmological constant.
Evolution results, in the Dark Energy cases, closely approach open models.
