Classification of northern boreal dark coniferous forests in the West Siberian plain was developed using the Braun-Blanquet approach. In the northern part of the West-Siberian plain, boreal coniferous forests occur at the northern limit of their range characterized by cold continental climate and prevalence of long-frozen, poorly drained soils in watersheds. All syntaxa were assigned to the class Vaccinio-Piceetea Br.-Bl. in Br-Bl., Siss. & Vlieger 1939, order Piceetalia excelsae Paw . in Paw ., Soko owski & Wallisch 1928. Association Rubo arctici-Abietetum sibiricae ass. nova hoc loco was included in the alliance Aconito rubicundi-Abietion sibiricae Anenkhonov et Chytry 1998. Association Pino sibiricae-Abietetum sibiricae ass. nova hoc loco was included in the provisional alliance Pino sibiricae-Abietion sibiricae. Some problems of the syntaxonomic status of north-boreal dark-coniferous forests are disscused.