During preventive otorhinolaryngological examination of 262 workers from the plant for wood planes, subject to a combined effect of unfavourable microclimatic, dust, toxic (in particular formaldehyde) factors, are carried out profound studies of the nose and the cavities around the nose. More than 50% of the complains are of the nose-gullet which decrease with the increase of the length of service, while the objective changes in the mucous membrane of the nose raise high. In 70 (26.7%) of the workers are observed pathological changes, mainly of chronic hypertrophic rhinitis. Of special interest is the comparative high per cent of changed nasal architectonic (16.0%). In 43.5% of the cases with nasal diseases are established changes in the olfactory function (hyposmia I and II rate) of respiratory type. Deviation on behalf of the respiratory, motive and hemodynamic functions of the nose are observed.