The Elf (Electric Low Floor) is an electric multiple unit developed by Polish rolling-stock manufacturer Pesa SA. It is intended for commuter and regional service where platform height is . It is based on earlier EMU designs named ED59 and ED74. A Pesa Elf was exhibited at InnoTrans 2010.
In 2016 a new version, Elf 2, was introduced, featuring new design. In 2019, Elf.eu (a multisystem version targeting EU markets) was introduced.