Peter Iwers (born on 15 May 1975) is the former bass player of the Swedish band In Flames. He played with In Flames from their 1999 album Colony, up until their 2016 album Battles, originally replacing Johan Larsson who departed after 1997's Whoracle. He was also the bassist for the band Cyhra with former In Flames bandmate Jesper Strömblad from 2017 to 2018. Iwers also played bass on multi-national band Fleetburner's self-titled debut album, released in 2020.
His bass playing style has been influenced by Toto bassist Mike Porcaro, as well as Geddy Lee from Rush and John Myung of Dream Theater fame.
He has two daughters and one son. His brother Anders is also a bass player, who plays for Tiamat, Avatarium (2014-) & Dark Tranquillity (2015-). Peter Iwers now brews beer at his brewery outside Gothenburg, Odd Island Brewing, together with the founder and co-owner Daniel Svensson, another former In Flames bandmate.
Before he joined in Flames, Iwers played in a band called Chameleon.