Polirural objective number 3 is to “explore the future trajectory of rural development in regions using a hybrid foresight approach (quantitative plus qualitative), taking into account both historic and current situation”. System Dynamic Modelling (SDM), is going to help in the foresight approach. During the first year of project, a template model has been built (SDM edition 1) as well as some sample models to understand the usefulness of the modelling exercise. We are presenting in this article one of the sample models, specifically dealing with Rural Attractiveness, a central issue in Polirural project. This is not a real model, in the sense that the data running the model are not taken from any local statistics. It is a sample model that considers Rural Attractiveness (RA) as the main factor regulating urban/rural population flows, in both senses (from rural to urban and the other way around).