| Sami Lopakka | |
| Alias: | S.S. Lopakka The Serial Self-Killer |
| Birth Date: | 17 January 1975 |
| Origin: | Finland |
| Genre: | Heavy metal, death metal, doom metal, melodic death metal, gothic metal |
| Occupation: | Musician, songwriter |
| Instrument: | Guitar |
| Years Active: | 1989–present |
| Current Member Of: | KYPCK |
| Past Member Of: | Sentenced |
Sami Lopakka (born 17 January 1975) is a Finnish guitarist and author. He was one of two guitarists for the metal band Sentenced until it disbanded (1989–2005). He was the band's main lyricist and was also considered to be the spokesman for the band.
Since 2007, Lopakka has been the guitarist and main songwriter for the Russian-singing Finnish metal band KYPCK, with whom he plays a custom baritone guitar built around a Kalashnikov AK-47 assault rifle by Amfisound Guitars.
As an author, Lopakka's debut novel Marras was published in January 2014 by Like Kustannus Oy in Finland. His short story Uudet lasit was published in the Finnish edition of Granta literary magazine in the same year.