Aviv Geffen is an Israeli rock musician, singer, songwriter, producer, keyboardist and guitarist. He is a founding member of Blackfield, a music project in which he collaborates with the English musician Steven Wilson.

Geffen started studying music at the age of six and began writing songs at the age of seven. By the end of primary school, he learned to play six instruments. His first public appearance took place in 1984.

His first album Ze Rak Or Hayareach (in English: It’s Only the Moonlight) was released in 1992. Geffen continues to create music ever since. His music addresses topics such as love, peace, death, politics and the military.