A swashbuckler is a genre of European adventure literature that focuses on a heroic protagonist stock character who is skilled in swordsmanship, acrobatics, guile and possesses chivalrous ideals. A "swashbuckler" protagonist is heroic, daring, and idealistic: he rescues damsels in distress, protects the downtrodden, and uses duels to defend his honor or that of a lady or to avenge a comrade.

Swashbucklers often engage in daring and romantic adventures with bravado or flamboyance. Swashbuckler heroes are gentleman adventurers who dress elegantly and flamboyantly in coats, waistcoats, tight breeches, large feathered hats, and high leather boots, and they are armed with the thin rapiers used by aristocrats.

Swashbucklers are not unrepentant brigands or pirates, although some may rise from such disreputable stations and achieve redemption. His opponent is typically characterized as a dastardly villain. While the hero may face down a number of henchmen to the villain during a story, the climax is a dramatic one-on-one sword battle between the protagonist and the villain. There is a long list of swashbucklers who combine courage, skill, resourcefulness, and a distinctive sense of honor and justice, as for example Cyrano de Bergerac, The Three Musketeers, The Scarlet Pimpernel, Robin Hood, and Zorro.

As a historical fiction genre, it is often set in the Renaissance or Cavalier era. The stock character also became common in the film genre, which extended the genre to the Golden Age of Piracy. As swashbuckler stories are often mixed with the romance genre, there will often be a beautiful, aristocratic female love interest to whom the hero expresses a refined, courtly love. At the same time, since swashbuckler plots are often based on intrigues involving corrupt religious figures or scheming monarchs, the heroes may be tempted by alluring femme fatales or vampish courtesans.