Abstract
Leibniz is well known as an opponent of the theories of causation which have to support causal relationships between created substances. But he was also an opponent of occasionalism, theory that sustain all reality would be produced solely be God. Denying that God produces only substances, leaving totally dependent of those the production of their states, as the conservationists would want, Leibniz proposed a complex theory of divine concurrence to explain metaphysically the changes of states of substances through a causal participation between God and his creatures. This article proposes some suggestions to clarify the concept of divine concurrence, as a third option between occasionalism and mere conservatism.