A combined method of generating steam in a steam cooking oven (2), wherein said steam cooking oven (2) comprises a cooking chamber (3) that includes at least one heating element (10) and at least a fan (4) for forcing air circulation inside the cooking chamber (3), where said steam cooking oven (2) is associated with a steam generator (5) and is connected to a supply ( 6) of water, where a water injection pipe (8) is also connected to said water supply (6) and is arranged inside said cooking chamber (3) to spray water against said element (10) ) of heating, wherein said combined method comprises the following steps: a saturation step, wherein said steam generator (5) is activated until said cooking chamber (3) is substantially saturated with steam, and a spray step, which is carried out after s of the saturation step, in which said steam generator (5) is disconnected and steam is produced by spraying water on said at least one heating element (10) through said pipe (8) of water injection, and that it is characterized in that said steam generator (5) is activated temporarily and periodically during said spraying step at the moment when instantaneous production falls due to the cooling effect of said element (10 ) of heating to maintain the substantially unaltered steam quality, where the activation and deactivation of said steam generator (5) is controlled by means of a control means (11) that is operated by means of a detection means adapted to detect the percentage of humidity in said cooking chamber (3).Un método combinado de generación de vapor en un horno (2) de cocción por vapor, donde dicho horno (2) de cocción por vapor comprende una cámara (3) de cocción que incluye al menos un elemento (10) de calentamiento y al menos un ventilador (4) para forzar la circulación de aire en el interior de la cámara (3) de cocción, donde dicho horno (2) de cocción por vapor está asociado a un generador (5) de vapor y está conectado a un suministro (6) de agua, donde una tuber
