As a part of systematic investigation of synthesis, characterization and antimicrobial screening of some novel 3-(2-(6-methyl-1H-benzo[d]imidazol-2-yl)phenyl)-2- (aryl)thiazolidin-4-ones (3a–l), have been synthesized from Schiff bases of N-arylidene-2-(6-methyl-1H-benzo[d]imidazol-2-yl)anilines, (2a–l). The Schiff bases (2a–l) were prepared by condensation of different aldehydes with 2-(6 methyl-1H-benzo[d]imidazol-2-yl)aniline (1). The compound (1) was obtained from 2-amino benzoic acid and 4-methylbenzene-1,2-diamine. All the synthesized compounds were screened for in vitro antibacterial and antifungal activities on Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Staphylococcus pyogenes, Candida albicans, Aspergillus niger, and Aspergillus clavatus. The structures of the compounds synthesized were elucidated by IR, 1 H-NMR, 13C-NMR, and mass spectra.