The fungicidal monomer, N-acryloyl-2-(4’-thiazolyl)benzimidazole (AcTBZ) was synthesized from 2-(4’-thiazolyl)benzimidazole (TBZ) and acryloyl chloride in the presence of triethylamine in dry benzene at 30-degrees-C. rhe synthesized ACTBZ was identified by IR and H-1-NMR spectra. The homopolymers of AcTBZ were obtained using BPO as a thermal initiator in benzene under different experimental conditions such as various initiator concentrations or polymerization temperatures. The homopolymer of AcTBZ was also prepared using benzophenone as a photo initiator in DMF at 20-degrees-C. The average molecular weights (Mw) of those poly(AcTBZ)s obtained were very low, being in the order of ca. 10(3). Co-polymer of AcTBZ and acrylic acid (AA) was synthesized with thermal or photo initiators. Poly(AcTBZ) and poly(AcTBZ-co-AA) were identified by IR and H-1-NMR spectra. The fungicidal activities of AcTBZ, poly(AcTBZ), and poly(AcTBZ-co-AA) were studied using agar dish test. The fungicidal activities of AcTBZ and its polymers as well as TBZ against Aspergillus niger and Chaetomium globusum were very excellent compared to those of control polymers such as poly(AA) and poly(ethylene-co-vinyl acetate . The fungicidal activities were decreased in the order TBZ > AcTBZ > poly (AcTBZ) > poly (AcTBZ- co-AA) against both Aspergillus niger and Chaetomium globusum. The fungicidal activities of TBZ, and the synthesized AcTBZ and polymers containing AcTBZ were better against Chaetomium globusum than against Aspergillus niger.