Adventure fiction is a type of fiction that usually presents danger, or gives the reader a sense of excitement. Some adventure fiction also satisfies the literary definition of romance fiction.

Adventure has been a common theme since the earliest days of written fiction. Indeed, the standard plot of Medieval romances was a series of adventures. Following a plot framework as old as Heliodorus, and so durable as to be still alive in Hollywood movies, a hero would undergo a first set of adventures before he met his lady. A separation would follow, with a second set of adventures leading to a final reunion.

Variations kept the genre alive. From the mid-19th century onwards, when mass literacy grew, adventure became a popular subgenre of fiction. Although not exploited to its fullest, adventure has seen many changes over the years – from being constrained to stories of knights in armor to stories of high-tech espionages.