Robert Mateja (born 5 October 1974) is a Polish former ski jumper who competed from 1992 to 2008. His best individual World Cup finishes were fifth in Harrachov (large hill) on 14 December 1996, and fifth again in Sapporo on 28 January 2001. His best team finish was third in Villach on 9 December 2001. Mateja retired from competitive sport in 2008 to work as an assistant coach of Polish national ski jumping team.