The total IgE level and some indicators of nonspecific suppressor activity (NSA) (the amount of theophylline-sensitive sells and the activity of Con A-induced spontaneous and short-lived suppressors) were studied in 36 pollinosis patients with high sensitivity to timothy dust, confirmed by the data of the allergological anamnesis, the data of skin and provocative tests with timothy allergen, and by the presence of allergen-specific IgE antibodies. The IgE level ranged from 23 to 2925 KU/1. Preincubation of mononuclear cells with theophylline did not lead to a significant diminution of the number of E-RFC. The majority of patients demonstrated the activity of all the above-indicated suppressors upon the use of mitogens at several concentrations. Correlation of the NSA with the IgE magnitudes showed disagreement in all the cases with the exception of the test with short-lived suppressors (a variant of the test culture with Con A) where in one group of patients (11 examinees), a direct relationship was found, whereas in the other one (10 examinees), a reverse relationship. It is concluded that the test forms of NSA of lymphoid cells do not play an essential role in the maintenance of the total IgE level in pollinosis patients.