Which McDonald's mascot was a hamburger thief dressed in a striped outfit and mask?

The Hamburglar was McDonald's hamburger-thief mascot dressed in a striped outfit and mask.

He was one of the central characters in McDonaldland advertising and was defined by his attempts to steal hamburgers. The character's visual design changed over time. Early versions were more sinister and wore a long black cloak, while the later, more child-friendly version used a striped costume, mask, cape, and exaggerated comic behavior.

The Hamburglar's role created a simple recurring story for commercials: he wanted McDonald's hamburgers, while Ronald McDonald and the other characters tried to stop or catch him. This made the character memorable without requiring viewers to understand a complicated plot.

The Hamburglar is distinct from Grimace, Mayor McCheese, and Birdie the Early Bird, who were also part of the McDonaldland cast. His defining branding feature is the thief persona, especially the repeated “robble” speech associated with later portrayals. McDonald's reduced the character's visibility in later advertising eras.