The study provides information about one of the educational institutions of the Slovak military power, the Slovak state military grammar school, which was established as the military secondary school providing grammar school education. The author points out reasons which lead to the establishment, its short several years of existence and the reasons for dissolution. The Slovak state military grammar school was established as a prospective and significant military educational institution aimed at significantly participating in the training of professional officers, either the Military Academy graduates or graduates of the civil higher education. The Slovak state military grammar school was supposed to provide its graduates with complete civil secondary education with grammar school leaving examination. In addition to the general grammar school subjects, the school provided the pupils also with the studies of military subjects and a practical military training at the level of reserve officer education. The Slovak state military grammar school only originated in 1942, being dissolved by the outbreak of the Slovak National Uprising in late August 1944.Subsequently, it was only renewed for the period of a few months in early 1945, existing until the end of the First Slovak Republic. The first part of the study points out to the reasons for establishment of the school, the course of its establishment process, building of the command and teaching staff. Furthermore, the first part of the study observes the course of studies of the first year pupils in the school year of 1942/1943 as well as its subsequent temporary relocation to Turčiansky Sv. Martin, where the school was seated in the school year 1943/1944.The study mentions the demands for studying at the military grammar school, with the teaching subjects based on the grammar school curriculum composed for civil grammar schools with emphasis on natural sciences and technical subjects.