The article is devoted to the motivational readiness of future officers of missiles and artillery armament as a factor of their professional development. The author noted that the motives occupy an increasingly prominent place in the structure of future missile and artillery armament officers’ professional training for a future military service. These motives are determined in the article as a person’s inner encouragement to activity, connected with meeting certain needs. The benefit of this study is that a group of motives that determine the professional activity of military specialists has been identified. Moreover, the analysis of the motivational sphere gave grounds to identify the needs of the cadets: an attractiveness of the specialty, a physical training, a military honor and dignity, relations with colleagues, obtaining a civilian specialty for budgetary funds, a social status, and an extension of family traditions of military service. The motivational readiness of cadets is characterized by the appropriate orientation and the presence of the content of activities, the professional attitudes of an individual. As a result, the cadets’ motivational readiness is defined as a stable system of the person’s psychological formations that create appropriate states of mind and encourage military experts to work. The author has made a conclusion in the article that the professional training of a future officer of missile and artillery armament should result in the following: the qualitative performance of operational duties; the ability to make interpersonal relations with a personnel; the ability to see the point in a military service, to set goals, and to exert an insistence in reaching them, to rationally share the duties among the military servicemen, to get a job done; the ability to adapt for a change in social environment through general and military education; a desire for continuous self- development; a confidence in personal skills and correctness of the path pursued. The following three levels of motivational readiness of future officers are revealed by the author of the article: high level (characterized by a pronounced need in military professional self- development), average level (distinguished by the motivational and value structure), low level (characterized by a poor value orientation and military service guidance).