This dissertation examines Deuteronomy 17,14-20, the law of the king, considering especially diachronic elements examined in the light of historicalcritical methods. This analysis provides the basis for the topics covered in the commentary. The study notes that the law of the king shows some contrasts and similarities between the Deuteronomistic History , particularly the accounts of Solomon. The law of king however is peculiar in its way to evaluate and criticize the tradition. It is concluded that the duties and rights dealt by the law of king are essentially utopian, though it reflects an knowledge of the historical reality of which it emerged. Furthermore, it is noted that Dt 17,14-20 shows much similarity in their terms and themes with the rest of the book of Deuteronomy and the broader biblical tradition, but also reveals thematic discontinuity. Based on the interrelation between the law of king and other parts of the Old Testament, it is possible to note that the book of Deuteronomy denies to the king the essential elements to the monarchial exercise in the Ancient Near East.