What is the name of the McDonald's character that is a hamburger thief?

The McDonald’s character who is a hamburger thief is the Hamburglar. He is a fictional character dressed in a black-and-white striped outfit, cape, gloves, and a wide-brimmed hat, and his signature gag is trying to steal hamburgers.

The Hamburglar first appeared in McDonald’s advertising in the early 1970s as part of a larger cast of mascots. Earlier versions looked more like a small, elderly burglar, while the character was later redesigned into a younger, cartoon-like figure. His exaggerated “Robble, robble” catchphrase became closely associated with the mascot.

The character is often confused with Captain Crook, another former McDonald’s mascot who was associated with Filet-O-Fish sandwiches. Mayor McCheese was a hamburger-headed mayor, while Grimace was a large purple character whose role changed over time. None of those characters was the hamburger thief; that role belongs specifically to the Hamburglar.