The study of Kemantan on functionally alternative humoral immunity regulator cells: T-helpers and antigen-specific T-suppressors, including their induction, accumulation and functioning, was studied. Kemantan in doses of 0.2-200 mg/kg, introduced to the donors of T-helpers 2 days before they were taken, stimulated their activity 1.5- to 2-fold (with p less than 0.05). Kemantan had no influence on the functional activity of T-suppressors, as well as on their induction and accumulation.