The article is devoted to investigation of the specifics of simultaneous interpretation as a top of the translation skills, which determines high demands to the level of development of translation competence. The subject of research is the study of modern approaches to the classification of errors that occur in the simultaneous interpreting activity. The aim of the research are: 1) an investigation of the causes and mechanisms which lead to appearance of the errors in the implementation of practical translation work of a simultaneous interpreter; 2) an analysis of modern approaches to the classification of possible translation errors.