Neste artigo, fundamentado nos principais escritos de Guilherme de Ockham, O. Min. (c. 1285–1347), analisamos sua concepção a respeito das origens dos poderes imperial e secular. Ancorado no versículo paulino omnis potestas a Deo, mas ampliado, sed per homines e, igualmente, nas ideias dos confrades que o antecederam, os quais relacionaram entre si os conceitos proprietas e dominium, com vista a explicar as origens humanas dos mesmos, de um lado, ele rebate tanto a teoria hierocrata quanto a de Marsílio de Pádua, relativas ao tema em exame e, de outro, oferece sua contribuição ao mesmo, mediante a qual, nem o Império nem os Estados estão completamente subordinados à Igreja, nem esta está submissa ao poder terreno, porque, quanto às origens de ambos, a Igreja tem uma procedência divina e os Estados e o Império têm imediatamente uma origem humana e, ainda, porque nas esferas respectivas de atuação, os poderes espiritual e secular independem um do outro.In this article, based on the most important William of Ockham’s O. Min. (c. 1285 – 1347) writings, we analyze his ideias concerning the origins of the imperial and secular power. Founded in the Paul’s doctrine omnis potestas a Deo, but enlarged, per homines, and also on the ideas of his Franciscan brothers which lived before, which articulated the concepts of proprietas and domininum, in order to explain the human origins of the both, on the one hand, Ockham refuses not only the hierocratic theory, but also Marsilius of Padua thought about this subject, and, on the other hand, he offers his contribution for this subject, according with which, nor the Empire neither the Estates are completely subordinated to the Church, nor the Church is subordinated for the secular power, because, referring its origins, both, Church and Estates are different origins, the first has a divine proceeding, the others, are immediately a human provenance and, because, in its specific spheres of action the spiritual power and the secular power do not depend one of the other and vice versa.In this article, based on the most important William of Ockham’s O. Min. (c. 1285 – 1347) writings, we analyze his ideias concerning the origins of the imperial and secular power. Founded in the Paul’s doctrine omnis potestas a Deo, but enlarged, per homines, and also on the ideas of his Franciscan brothers which lived before, which articulated the concepts of proprietas and domininum, in order to explain the human origins of the both, on the one hand, Ockham refuses not only the hierocratic theory, but also Marsilius of Padua thought about this subject, and, on the other hand, he offers his contribution for this subject, according with which, nor the Empire neither the Estates are completely subordinated to the Church, nor the Church is subordinated for the secular power, because, referring its origins, both, Church and Estates are different origins, the first has a divine proceeding, the others, are immediately a human provenance and, because, in its specific spheres of action the spiritual power and the secular power do not depend one of the other and vice versa