Bob Daisley (born February 13, 1950, in Sydney, Australia) is a renowned bassist, songwriter, and lyricist whose career spans over five decades. He is best known for his extensive work with Ozzy Osbourne, which contributed significantly to Osbourne's early solo success.

Daisley began his musical journey in the 1960s, initially playing guitar before switching to bass at age 14. He gained early recognition with bands like Kahvas Jute and Chicken Shack. In the mid-1970s, he co-founded Widowmaker and later joined Ritchie Blackmore's Rainbow, contributing to their 1978 album Long Live Rock 'n' Roll.

His most notable collaboration was with Ozzy Osbourne, starting in 1979. Daisley played bass, co-wrote songs, and co-produced several of Osbourne's albums, including Blizzard of Ozz (1980) and Diary of a Madman (1981) ...