The dictionary of service words of the Russian language is a lexicographic description of service units belonging to the classes of particles, conjunctions and so-called hybrid words. Each class represents the words of certain semantic groups. The description is multivariable, reflecting the semantic, pragmatic, constructive, communicative and other properties of utility words characteristic of their modern use. The dictionary is designed for specialists in the field of modern Russian, university and school teachers, students and everyone interested in the Russian language.