Antonios Gioulbas (also Antonios Gkioulmpas, Greek: Αντώνιος Γκιούλμπας; born April 17, 1986) is a Greek former swimmer, who specialized in backstroke events.[1] Gioulbas qualified for the men's 200 m backstroke at the 2004 Summer Olympics in Athens, representing the host nation Greece. He cleared a FINA B-standard entry time of 2:01.35 from a test event at the Athens Olympic Aquatic Centre.[2][3] He challenged seven other swimmers on the third heat, including top medal favorite Tomomi Morita of Japan. He touched out Spain's Aschwin Wildeboer to take a seventh spot by 0.03 of a second in 2:04.30. Gioulbas failed to advance into the semifinals, as he placed twenty-eighth overall in the preliminaries.[4][5]