An American rock guitarist and songwriter. He was the guitarist in the Doors and wrote some of their best known songs, including Light My Fire and Love Me Two Times.

A native of Los Angeles, Krieger learned to play guitar when he attended Menlo School in the San Francisco Bay area. He started by tuning a ukulele like the bottom 4 strings of a guitar and imitating a flamenco guitar record. He later purchased a flamenco guitar on a Christmas vacation in Puerto Vallarta in 1963 and mastered the style without benefit of lessons. He gradually grew tired of playing flamenco and helped form a jug band called the Back Bay Chamberpot Terriers with Bill Wolff (later of the Peanut Butter Conspiracy).

He formed the Doors with keyboard player Ray Manzarek, drummer John Densmore and vocalist Jim Morrison. At an early Doors rehearsal, Morrison heard Krieger playing bottleneck guitar and initially wanted the technique featured on every song on the first album. Krieger's fingerstyle approach to the electric guitar, eclectic musical tastes and songwriting helped establish the Doors as a successful rock band in the 1960s.

After Morrison's death in 1971, the Doors continued as a trio and released 2 albums, Other Voices and Full Circle, with Krieger sharing lead vocals with Manzarek. After the Doors disbanded in 1973, Krieger formed the Butts Band with Densmore. He enjoyed some success as a jazz guitarist and recorded a handful of albums as the Robby Krieger Band in the 1970s and 1980s.
In 2000, Krieger released Cinematix, an entirely instrumental fusion album, with guest appearances from Billy Cobham and Edgar Winter.

Krieger and Manzarek reformed as the Doors of the 21st Century in 2002 with vocalist Ian Astbury, formerly of the Cult. Following a dispute with Densmore over the Doors name, the band is now known as Riders on the Storm. For a brief period, the reformed band also included Police drummer Stewart Copeland.

In recent times, Krieger has made some guest appearances with the band Particle.