| Selçukgazi Tunnel Selçukgazi Tüneli | |
| Location: | Selçukgazi, Osmangazi, Bursa Province |
| Coordinates: | 40.3236°N 29.1072°W |
| Status: | Operational |
| Startwork: | July 2013 |
| Owner: | General Directorate of Highways |
| Traffic: | automotive |
| Character: | Twin-tube motorway tunnel |
| Construction: | Otoyol A.Ş. |
| Length: | 1192and |
| Lanes: | 2 x 3 |
The Selçukgazi Tunnel (Turkish: Selçukgazi Tüneli) is a motorway tunnel located at Dürdane Hill in Marmara Region as part of the Istanbul-Bursa Motorway in Turkey.
Situated near Selçukgazi village in Osmangazi district between Gemlik and Bursa, it is a twin-tube tunnel of 1192and. The construction is carried out by Otoyol A.Ş., a consortium of Turkish Nurol, Özaltın, Makyol, Yüksel, Göçay and Italian Astaldi companies. Works at the tunnel began in July 2013, and are continuing. In March 2014, it was announced that the preparatory works are completed and tunneling will start soon.
The tunnel was opened to traffic on March 12, 2017 by Turkish Prime Minister Binali Yıldırım.
Other tunnels on the route are the 3586and-long Orhangazi Tunnel and the 1556and-long Belkahve Tunnel.