Line 4 of the Hangzhou Metro () is a rapid transit line in Hangzhou. It is colored green on maps.
Phase 1 of the line started operation since 2015. Running northeastâÂÂsouthwest, the line connects Hangzhou East railway station, Qianjiang New City and Binjiang District. Part of the line ( to Shuicheng Bridge) runs along the north bank of Qiantang River.
The second phase of Line 4 is in length. This extension was opened on 21 February 2022.
- Operational - Under construction