To find new antibacterial agents, 25 novel amide derivatives containing an 1,3,4-oxadiazole moiety were designed and synthesized, and their antibacterial activity against Xanthomonas oryzae pv. oryzicola (Xoc) and Xanthomonas oryzae pv. oryzae (Xoo) were tested. Interestingly, all target compounds showed excellent antibacterial activities against Xoc and Xoo. The EC50 values of compounds 1–25 against