Territorial development faces lack capacities. Formation is often used to improve these capacities. This communication proposes a reflexion how to reinforce the capacities necessary to territorial development. These capacities are diverse, and reinforcing simultaneously the human capital, social capital and institutional capital of the actors constitutes a real challenge for a training process. Using different learning theories, we will suggest hypotheses concerning training for sustainable development: the diversity of actors, problematic and the insertion of the process in the territory. We will stress in particular the importance of linking the training devices to the devices of territorial governance, to enable the actors to fully apply the new competencies acquired to the benefit of territorial development.