Which superhero's secret identity is Bruce Banner?

Bruce Banner’s superhero identity is the Hulk. Banner is a brilliant physicist whose exposure to gamma radiation triggers the transformation into the powerful green hero known as the Hulk.

The character was created by writer Stan Lee and artist Jack Kirby and first appeared in The Incredible Hulk #1 in 1962. In the original origin story, Banner is caught in a gamma-bomb test while saving teenager Rick Jones. The radiation alters him, causing transformations that are often linked to anger, fear, or emotional stress.

Early stories portrayed the Hulk as a dangerous alter ego with limited intelligence, while later comics introduced several distinct versions and personalities. The relationship between Banner and Hulk has therefore changed repeatedly: they may be enemies within one body, reluctant partners, or more integrated aspects of the same person.

Bruce Wayne is Batman, Clark Kent is Superman, and Tony Stark is Iron Man. Those identities are common superhero mix-ups, but none is connected to Bruce Banner. The Hulk’s strength increases dramatically with his anger, making emotional control a central part of his stories.