Fan for ovens, which comprises a support plate and multiple blades projectingly fixed on the support plate and arranged around the rotation axis of the fan. Each blade is provided with a rear edge fixed to the support plate, with an external edge and with an internal edge placed to connect between the rear edge and the external edge and facing the front side of the fan. The fan also comprises a ring fixed to the blades, positioned in a position substantially intermediate between the internal edge of the blades and the support plate in order to create a non-interference zone.