The article focuses on the constitutional aspects of defense and security of the Republic of Poland. It analyzes the provisions of the Constitution concerning defense and security, including the tasks and the competences of the state bodies in the area of defense and security, the principles of commanding over the Armed Forces in time of peace and wartime, their tasks in the field of defense and security. According to the author of article the constitutional regulation on security of the Republic of Poland leaves room for numerous doubts. They can be largely attributed to the lack of a distinct division of the state bodies’ competencies in the area of security and defense. The Constitution does not stipulate the rules on commanding over the country in wartime. Whereas solutions included in the statutes arouse doubts in terms of their accordance with the Constitution.