Štěpán Janáček (; born 12 June 1977 in Prague) is a Czech former pole vaulter.

He finished eighth at the 2001 World Indoor Championships, second at the 2001 Summer Universiade and fifth at the 2002 European Championships. He also competed at the World Championships in 1999, 2001 and 2003 as well as the 2000, 2004 and 2008 Olympic Games without reaching the finals.

His personal best jump is 5.76 metres, achieved in June 2002 in Prague. The Czech record is currently held by Adam Ptáček with 5.80 metres. - The Athletics Site

He is married to a Polish former sprinter, Grażyna Prokopek.

Competition record Representing the 1996World Junior ChampionshipsSydney, Australia15th (q)Pole vault5.00 m4thDecathlon7276 pts1999UniversiadePalma de Mallorca, Spain 2ndPole vault5.60 mEuropean U23 ChampionshipsGothenburg, Sweden8thPole vault5.50 mWorld ChampionshipsSeville, Spain29th (q)Pole vault5.40 m2000Olympic GamesSydney, Australia14th (q)Pole vault5.65 m2001World Indoor ChampionshipsLisbon, Portugal8thPole vault5.60 mJeux de la FrancophonieOttawa, Canada 2ndPole vault5.55 mWorld ChampionshipsEdmonton, Canada19th (q)Pole vault5.50 mUniversiadeBeijing, PR China 2ndPole vault5.70 m2002European Indoor ChampionshipsVienna, Austria14th (q)Pole vault5.40 mEuropean ChampionshipsMunich, Germany5thPole vault5.75 m2003World Indoor ChampionshipsBirmingham, United Kingdom11th (q)Pole vault5.55 mWorld ChampionshipsParis, France26th (q)Pole vault5.20 m2004Olympic GamesAthens, Greece28th (q)Pole vault5.30 m2006European ChampionshipsGothenburg, Sweden24th (q)Pole vault5.35 m2008Olympic GamesBeijing, China30th (q)Pole vault5.30 m

References