Qingdao Jiaozhou Bay Tunnel is an under-sea road tunnel located in Qingdao, Shandong Province in eastern China.

It crosses underneath Jiaozhou Bay, connecting Huangdao District to the south with Shinan District in the north at the narrow entrance to the bay.

It opened the same day as the nearby Qingdao Jiaozhou Bay Bridge, considered at the time the world's longest open-water bridge by Guinness World Records.

[6][7] The bridge and tunnel were planned together as the Jiaozhou Bay Connection Project.

[9] The deepest point of the crown of the tube to sea level is 74 meters.