Jiránek started his professional career in 1997 for Bohemians Prague, making 55 appearances, before leaving for Slovan Liberecin 1999. He made 32 appearances, and helped Slovan to win the Czech Cup in the 1999/2000 season.
In 2001, Jiranek moved to Italian Serie B side Reggina. In his time at Reggina, Jiranek would make 100 league appearances, helping Reggina gain promotion to Serie A in the 2001/02 season.
Spartak Moscow signed Jiránek in 2004 for €4.7m from Reggina. Jiránek made his debut against FC Lokomotiv Moscow. Jiránek was a regular in the starting line-up for six years. Jiránek was the captain of the team in 2009–2010.
On 31 August 2010, he moved to English Premier League club Birmingham City, signing a one-year deal, having rejected offers from a variety of clubs. Jiránek made his debut in the starting eleven for the League Cup third-round match against MK Dons, and had a good chance to score as Birmingham won 3–1. His second start came in a tidy performance as several first-team regulars were rested for the FA Cup third round tie against Millwall which Birmingham won 4–1. After Scott Dann was injured in the first leg of the League Cup semi-final against West Ham United, Jiránek became a regular starter, and he was in the starting eleven as Birmingham beat favourites Arsenal 2–1 in the League Cup Final at Wembley Stadium. A toe injury that eventually required surgery disrupted the latter part of his season, and following Birmingham's relegation from the Premier League, he rejected the option of another season with the club.
In July 2011, Jiránek signed a two-year contract with Russian Premier League club Terek Grozny. In his second season with the club he scored a goal from 45 yards in the League Cup.
International
Jiránek was part of the Czech side which won the UEFA U-21 Championships in 2002. He made his senior international debut against Poland in 2002. Jiránek's first major international tournament came at Euro 2004, where he made 4 appearances before being ruled out of the semi-final with a thigh injury. He also was named in the Czech squad for the 2006 World Cup, but despite playing 5 qualifying matches, he did not make an appearance at the finals. He appeared in 5 qualifying matches for Euro 2008, but was not named in the Czech squad due to an ankle injury. His 31st appearance was in March 2007, against Germany - after which, he was fined for his involvement in a controversial birthday party.
Career statistics
Club
International
Statistics accurate as of match played 28 March 2007
