Roger Ruskin Spear (born 29 June 1943, in Hammersmith, West London), the son of Ruskin Spear, was a founding member of The Bonzo Dog Band, staying with it until its end.

After the band broke up, Spear continued as a performance artist with his robots in a show called Kinetic Wardrobe. A feature of this was a tailor's dummy fitted with proximity switches, which produced increasingly high-pitched screams when a hand neared its chest. He was also a member and co-founder of Bill Posters Will Be Band.

Until the end of 2014, he was a member of the Bonzos offshoot group 3 Bonzos and a Piano.