Jinshan Railway or Jinshan Line is a commuter railway line in Shanghai, part of the planned Shanghai Metropolitan Area Intercity Railway. It runs from Shanghai South in Xuhui District via Xinzhuang in Minhang District to Jinshanwei in Jinshan District, crossing the Huangpu River on a dedicated railway bridge. Passengers can transfer to Lines 1, 3, 5 and 15. Originally built in 1975 as a suburban branch, it has since been upgraded into a high-speed commuter rail line which opened on 28 September 2012. The line was branded as Line 22 before opening. However, there is another line in long-term planning called Line 22, see Line 22.

Line 3 is a north–south line of the Shanghai Metro network. Its older rolling stock carry a bright yellow colour belt to differentiate them from Line 4 trains which share a portion of its route, while the newer stock features a yellow and purple livery, which the exact line is labelled using sticker or screens saying “Line 3” or “Line 4”. Unlike the majority of the lines in the Shanghai Metro system, Line 3 is primarily elevated, entirely above ground except for Tieli Road, located at the entrance to Baosteel Group Corporation. The line runs from North Jiangyang Road in the north to Shanghai South Railway Station in the southwest of the city, where it meets line 1. While line 1 goes straight through the city center, line 3 roughly follows the Inner Ring Road around the city from Caoxi Road to Zhongtan Road. The line has about 300 drivers. Between December 26, 2000, and August 8, 2002, the line operated under the name Pearl Line; On August 8, 2002, it was renamed as Rail Transit Line 3. The line is colored yellow on system maps.