Erik Johannessen (born 22 July 1975 in Oslo) is a Norwegian trombonist and composer, who has played in bands like Jaga Jazzist, Trondheim Jazz Orchestra, Loud Jazz Band, Lord Kelvin, Funky Hot Grits, Ensemble Denada and Magic Pocket.

He has played with Joshua Redman and Trondheim Jazzorkester, Eirik Hegdal, Terje Rypdal, Jon Balke, Erlend Skomsvoll, Maria Kannegaard, and his own band, Magic Pocket.

He received the Sparebank1 Midtnorges JazZtipendiat 2009/10 with Magic Pocket and was awarded the Spellemannprisen 2010 in open class for the album One-Armed Bandit with Jaga Jazzist.

Johannessen's first solo album Inkblots (2012) is free improvisation accompanied by bassist Jon Rune Power from the Frode Gjerstad Trio and Magic Pocket drummer Erik Nylander.

[2] Inkblots (2012) With Jonas Alaska With Svigermors Drøm With Dum Dum Boys With Martin Hagfors With Thom Hell With Jaga Jazzist With Lord Kelvin With the Loud Jazz Band With Magic Pocket & Morten Qvenild With Raga Rockers With Susanne Sundfør With Trondheim Jazz Orchestra With others