O-Hum is an Iranian rock band from Tehran, Iran formed in 1998. The band consists of Shahram Sharbaf (lead vocals, guitar), Nima Ramezan (guitar), Roozbeh Gholipour (drums, percussion), Pouya Shomali (bass), Saman Vandadi (tar, setar, kamanche, daf).
O-Hum has released five albums: Nahal-e Heyrat (1999), Hafez Ashegh Ast (2001), Aloodeh (2005), E-Hum: O-Hum Remixes 1999-2009 (2010), In Kherghe Biandaz (2014). Their musical style is the mixture of western rock music with Persian traditional music, scales and Instruments.