The Kwun Tong line extension (abbreviated KTE; Chinese: 觀塘綫延綫; Jyutping: Gun1 Tong4 Sin3 Jin4 Sin3) is an extension of the MTR rapid transit network in Hong Kong.

It extends the existing train service of Kwun Tong line to Ho Man Tin station and Whampoa station.

Construction started on 25 July 2011[1] and opened for service on 23 October 2016.

[2] During the bid for Sha Tin to Central Link (SCL) in 2000s, in order to win the project, Mass Transit Railway proposed to extend the Kwun Tong line while Kowloon–Canton Railway suggest to construct an Automated People Mover in Whampoa.

[3][4] After the MTR–KCR merger in 2007, Hong Kong government appointed MTR to construct the SCL according to KCR proposal, while also extend the Kwun Tong line to Whampoa.