|Full name||Johannes Theodor Bücker|
|Date of birth||10 July 1948|
|Place of birth||Bestwig, Germany|
|Height||1.80 m (5 ft 11 in)|
|Playing position||Head Coach|
|Emirates Club (manager)|
|1981–1984||FC Schalke 04||54||(5)|
|2015–2016||Dibba Al-Fujairah Club|
* Senior club appearances and goals counted for the domestic league only.
Johannes Theodor 'Theo' Bücker (born 10 July 1948 in Bestwig, Germany) is a German football manager and a former player, He was most recently in charge of Lebanon national football team. He now coaches Dibba Al-Fujairah in the UAE UAE Arabian Gulf League.
On 8 August 2011, Bücker was announced as Lebanon's new head coach, with the former national team manager taking over the reins ten years after leaving the position. He is the first ever coach to bring Lebanon to the fourth and final qualifying round of the world cup. During this period, the Lebanese national team made impressive results. They defeated United Arab Emirates 3–1 in Beirut, South Korea 2–1 in Beirut, and Kuwait 1–0 in Kuwait in the third round. For the first time in their history, Lebanon defeated Iran by a single goal on matchday 4 of the final round. Bücker announced his retirement in May 2013, effective from 11 June 2013, after match that saw his side defeated by Iran 4–0.
In 2012, former Lebanon national team member Buddy Farah stated that the credit for Lebanon's success and improvement should go to Bücker and that he was the best thing ever to happen to Lebanese football.
- "7th WAFF CHAMPIONSHIP 2012" (PDF). the-waff.com. 8 December 2012. Retrieved 30 April 2013.
- "Theo Bücker". worldfootball.net. Retrieved 2 April 2012.
- Hill, Simon (29 August 2012). "Lebanon are starting to make a noise on world stage, says Fox Sports football commentator Simon Hill". Fox Sports. Retrieved 30 April 2013.
- Theo Bücker profile at Fussballdaten