Detention is the strictest of all foreseen measures to ensure the presence of the defendant and the undisturbed conduct of a criminal proceedings. The essence of this measure is to deprive the freedom of movement based on a court decision, when the conditions prescribed by the Code of Criminal Procedure are fulfilled, and, when the same purpose cannot be achieved by an another measure. In addition to general remarks on detention, in the paper we primarily paid attention to the first optional reason for the determination of detention - the threat of escape of the defendant. Besides the analysis of the provisions of Article 211, paragraph 2 of the Code of Criminal Procedure, which, under particular circumstances, include the situations being ...