 John Phillip LawDiabolik | Diabolik |
 Marisa MellEva Kant | Eva Kant |
 Michel PiccoliInspector Ginko | Inspector Ginko |
 Adolfo CeliRalph Valmont | Ralph Valmont |
 Claudio GoraPolice Chief | Police Chief |
 Mario DonenSergeant Danek | Sergeant Danek |
 Renzo PalmerMr. Hammond | Mr. Hammond |
 Caterina BorattoLady Clark | Lady Clark |
 Lucia ModugnoProstitute | Prostitute |
 Annie GorassiniRose | Rose |
 Carlo CroccoloLorry Driver | Lorry Driver |
 Lidia BiondiPolicewoman | Policewoman |
 Andrea BosicBank Manager | Bank Manager |
 Federico BoidoJoe | Joe |
 Tiberio MitriValmont's Henchman | Valmont's Henchman |
 Isarco RavaioliValmont's Henchman | Valmont's Henchman |
 Giorgio ScioletteDr. Ferrara | Dr. Ferrara |
 Terry-ThomasMinister of Interior / Minister of Finance | Minister of Interior / Minister of Finance |
 Francesco MulèCrematorium Operator (uncredited) | Crematorium Operator (uncredited) |
 Giulio DonniniDr. Vernier (uncredited) | Dr. Vernier (uncredited) |
 Angela PalmieriDr. Vernier's Nurse (uncredited) | Dr. Vernier's Nurse (uncredited) |
| FFranco BellucciFake Diplomat (uncredited) | Fake Diplomat (uncredited) |
 Massimo CiprariFake Diplomat (uncredited) | Fake Diplomat (uncredited) |
 Angelo CasadeiJournalist at Press Conference (uncredited) | Journalist at Press Conference (uncredited) |
| BBruno DegniJournalist at Press Conference (uncredited) | Journalist at Press Conference (uncredited) |
| CCarlo MicolanoJournalist at Press Conference (uncredited) | Journalist at Press Conference (uncredited) |
 Enzo MondinoJournalist at Press Conference (uncredited) | Journalist at Press Conference (uncredited) |
 Ferruccio FregoneseJournalist at Press Conference (uncredited) | Journalist at Press Conference (uncredited) |
 Mario PascucciJournalist at Press Conference (uncredited) | Journalist at Press Conference (uncredited) |
 Oscar SciamannaJournalist at Press Conference (uncredited) | Journalist at Press Conference (uncredited) |
