He was portrayed by Geoffrey Rush.
The Curse of the Black Pearl
Before the Curse of the Black Pearl, Barbossa was formerly the Chief mate of Captain Jack Sparrow. But one day Jack and Barbossa found a map to Isla de Muerta where the Aztec Treasure of Cortes was hidden. The crew and Jack agreed to equal shares of the treasure but Barbossa greedily wanted the treasure for himself and the crew. He then tricked Jack into revealing the Treasure's location lying that equal shares included knowing the treasure's location, while planning a mutiny. Jack agreed to say the location but then Barbossa and the crew mutinied and marooned Jack on a deserted Island much to Jack's anger. When they finally found the treasure Barbossa found out about a curse placed on the Aztec treasure by the heathen Gods but believed it to be a "Ghost Story" with the crew and then took the treasure but found after spending it that the curse was real. They were under the curse, which made them unable to taste, feel, smell, or their drinks would not satisfy and living the undead as immortals. The only way to lift the curse is to give back the coins and offer their blood. Bootstrap Bill Turner a crewmate then was infuriated at the crew's betrayal against Jack and sent a coin to his son Will so the crew would remain cursed. In response Barbossa tied a cannon to Bootstrap and threw him overboard the Pearl but only discovers later that Bootstrap's blood is needed to lift the curse. Ten years later, during the movie, Barbossa and the crew sunk many ships and found most of the coins of the treasure but needed to find the last one sent to Will by Bootstrap. Meanwhile Elizabeth Swann from Port Royal Jamaica had found Will and took possession of the medallion so that James Norrington would not hang Will for piracy. Barbossa sensed the last coin, which released a pulse, and then invaded Port Royal. His crew found Elizabeth who invoked Parley. Barbossa tricked Elizabeth into giving him the medallion in exchange for stopping the invasion after she identified herself as "Elizabeth Turner" believing now her blood can lift the curse. Elizabeth, when Barbossa ordered them to set sail, demanded to be taken to shore but Barbossa refused saying that the part with her being taken to shore was not part of their agreement. Barbossa offered Elizabeth the next night to dine with him. She refused but agreed when Barbossa threatened her with dining with the crew and being stripped nude. Elizabeth then became suspicious of why Barbossa was not eating but was encouraging her to eat instead. He finally realized she never heard of the curse and told her the story and how he wants to use her blood to lift the curse. Elizabeth ran from him but got cornered by Barbossa and stabbed him in the chest but Barbossa did not die and Elizabeth ran outside and went face-to-face with the crew which were now skeletons. Elizabeth was shocked that the curse was real and Barbossa walked outside in the moonlight which revealed him under the curse. Elizabeth now in deep shock ran into the room and was locked in for the rest of the night. The next day, Barbossa then took Elizabeth to Isla de Muerta to lift the curse. After a short speech Barbossa then told his crew that they were able to lift the curse and used Elizabeth's blood on the coin. But after a moment after the crew said they did not feel different; Barbossa shot one of his crewmates and they saw he was not dead. Now enraged Barbossa confronted Elizabeth asking her if Bootstrap was her father. She admitted that he was not but refused to tell Barbossa who Bootstrap's child was. Barbossa slapped her and she fell onto the hill of the pirate's treasure. Barbossa's crew began to blame him for Bootstrap's 'death' by saying every decision he made lead them from bad to worse. Barbossa angrily took out his sword and challenged the crew to fight him causing the crew to stop blaming him. After Jack, Barbossa's pet monkey, screeched in alarm and Barbossa looked where Elizabeth fell, he saw she was no longer there along with the medallion. He ordered the crew to find her but the crew instead brought Captain Jack Sparrow to him. Unable to believe his eyes, Barbossa asked Jack how he got off the island but Jack says it was because he (Jack) was Captain Jack Sparrow. Annoyed, Barbossa sarcastically said he would not make the mistake again and ordered his crew to kill Jack. Jack however asked if Elizabeth's blood worked. Barbossa ordered his crew to hold fire after realizing Jack knew whose blood they needed. On the Black Pearl Barbossa and Jack had a meeting for negotiations and Jack almost convinces Barbossa to give him (Jack) his ship but Barbossa is angered when Jack gives an offer to negotiate with the crew of the Interceptor for Barbossa's coin return. Barbossa instead orders Jack locked in the brig because that was the same attitude that lost Sparrow the Pearl in the first place. Barbossa caught up with the Interceptor and during the battle Jack the Monkey brought the medallion to Barbossa and Barbossa's crew won. When Barbossa captured the crew of the Interceptor including Elizabeth, and sunk the Interceptor, Barbossa was confronted by a man who claimed to be Will Turner. Will said he would shoot himself and fall overboard if the crew did not release Elizabeth. Ultimately Barbossa tricks him and frees Elizabeth and Jack Sparrow by marooning them on the same island Jack was on ten years ago assuming that moment would the last of Sparrow. Will and the crew of the Interceptor are imprisoned and Pintel, a crewmate, tells Will the story of why Bootstrap sent the medallion to Will. They arrive at Isla de Muerta and Barbossa plans to kill Will in order to break the curse. When the crew are chanting for the curse to be lifted Jack Sparrow comes to the cave alive and well much to Barbossa's dismay. Barbossa threatens Jack with death after Will but Jack convinces Barbossa that the Royal Navy came to ambush them. Jack convinces Barbossa to kill Will after he defeats the Dauntless (the Royal Navy's best ship) and Jack would give Barbossa 25% of Jack's plunder and a big hat. Barbossa agrees and waits in the cave for the battle to end with Jack and Will. He starts to trust Jack again but this friendship when Jack takes one of the pirates's swords and tosses his to Will and Will duels the pirates left to with Barbossa. Barbossa gets up and duels Jack. After a while of fighting Barbossa tosses his sword away and claims that Jack cannot beat him as he (Barbossa) is immortal. Jack tries anyway, but Barbossa sighs to himself and takes the sword out to stab Jack. But Sparrow enters the moonlight and it reveals he too became a cursed skeleton! He snuck a coin while talking to Barbossa. The duel continues until Elizabeth arrives. Jack cuts his arm and tosses his bloody coin to Will while Will cuts his arm too. Now furious Barbossa pulls out his prized pistol and attempts to shoot Elizabeth. But before he can pull the trigger Jack shoots Barbossa with his own shot that he saved to kill Barbossa for ten years.
Barbossa sneers that Jack wasted his shot but Will says "He didn't waste it!" and returns the last two coins breaking the curse. Barbossa looks at Jack in deep shock and unbuttons his coat and sees blood gushing badly from his chest from Jack's bullet. He looks at Jack and shakes his head shockingly and dies.
Dead Man's Chest
At the very end of Dead Man's Chest, with Jack Sparrow supposedly dead, Barbossa makes a shocking reappearance, having been resurrected by the Voodoo witch "Tia Dalma", later revealed to be the goddess "Calypso" soon he can help them save Jack. Barbossa's cameo in the second movie was a surprise. Because of this, Geoffrey Rush was not credited. In fact, Barbossa was not even included on the front of the second movie's DVD.
At World's End
In the third film, he goes with Elizabeth, Will, and the crew to Davy Jones's Locker to rescue Jack from the locker in order to release her. At the end of the third film, it is revealed that Barbossa has betrayed Jack yet again, though this time they merely leave without him from a port in a city area.
On Stranger Tides
In the fourth film, he has become a privateer in King George II's Royal Navy. He seeks to look for the Fountain of Youth. Near the end, he stabs Blackbeard with a poisoned sword and is now captain of the Queen Anne's Revenge, reverting back to being a pirate.
Dead Men Tell No Tales
In the fifth film, Barbossa returns as captain of the Queen Anne's Revenge. He is also revealed to be the biological father of Carina Smyth, an astronomer and horologist who was falsely accused for witchcraft. After being coerced by the notorious Captain Armando Salazar into helping him kill Sparrow, Barbossa soon learns of a powerful weapon called the Trident of Poseidon, that Salazar intends to use to eliminate all pirates of the ocean. To that end, Barbossa is forced to team up with Jack again to find the Trident, eventually learning of his true parentage to Carina. In the end following the destruction of the Trident, Barbossa sacrifices himself to kill Salazar and his remaining men to save Carina and the others. Following the deaths of Salazar and his men, Jack, Carina and the other pirates mourn for Barbossa's death; even Carina decides to take her father's surname in honor for his sacrifice.