Tseung Kwan O Tunnel (traditional Chinese: 將軍澳隧道; simplified Chinese: 将军澳隧道; Cantonese Yale: jeung1 gwan1 ou3 seui6 dou6) is a 900-metre tunnel beneath Ma Yau Tong in Hong Kong.

[1] Part of Route 7, it links Sau Mau Ping, Kwun Tong, Kowloon and the Tseung Kwan O New Town, Sai Kung District, the New Territories.

[2][needs update] The flat toll fee for the tunnel is HK$3 since opening.

[3] The toll fee has been waived since the opening of Tseung Kwan O–Lam Tin Tunnel on 11 December 2022.

Tseung Kwan O Tunnel is currently managed by Greater Lucky (H.K.)