Aim. Synthesis of a series of thiazolidinone-and pyrazoline-related compounds. In vitro screening of antiplasmodial activity of versatile heterocyclic derivatives. Methods: organic wet synthesis, analytical and spectral methods, pharmacological screening, SAR analysis. Results. A series of different thiazolidinone-and pyrazoline-based derivatives was screened against Plasmodium falciparum in in vitro assays. 5-(Z)-Arylidene-2-arylidenehydrazono-3-(4-hydroxyphenyl)-4-thiazolidinones showed high growth inhibition rates with the IC 50-2.32-2.39 µM. 5-Bromo-1-[2-[3-(4-chlorophenyl)-5-(4-methoxyphenyl)-3,4-dihydropyrazol-2-yl]-2-oxoethyl]indoline-2,3-dione 3 was the most active compound among tested with the IC 50-1.81 µM. Based on the screening data some structure-activity relationships were derived. Conclusions. A set of different thiazolidinone-and pyrazoline-related derivatives with antitrypanosomal and anticancer properties was screened against Plasmodium falciparum. Hitcompounds inhibiting growth of the parasite at micromolar concentrations were identified. The obtained results provide further avenues to develop more potent antimalarial agents on the base of investigated classes of small drug-like molecules.