While it was stated in the article 8 of the Constitution that the power and the duty of the executivebelong to the President and the Council of Ministers, via the amendment in 2017 of the articlethe Council of Ministers have been annulled andthe sole power as well as the duty of the executivehave been given to the President. Moreover, thereferences to statutory degrees and bylaws1 , regu latory acts realized by the Council of Ministers, wereremoved from the Constitution and the first handpower to regulate is bestowed upon the Presidentunder the name of presidential decree. Accordingly, in the new system, different from the otherregulatory acts and within the frame of the powerstipulated in the Constitution, the President couldmake a regulation by presidential decree withoutany reference to a law or approval of the legislative. In this article, beginning from their status theinitial state of the 1982 constitution and their entering into our legislation through the 2017 Constitutional amendments, the legal characteristics of the presidential decrees, the subjects that couldand could not be covered by them, their types, theprocedure for their adoption, comparison with other legislative acts and their control as well as thedecisions of the Constitutional Court pertaining tothis issue have been dealt with.