Line 1 is a north–south line of the Shanghai Metro. It runs from Fujin Road in the north, via Shanghai Railway Station to Xinzhuang in the south. The first line to open in the Shanghai Metro system, line 1 serves many important points in Shanghai, including People's Square and Xujiahui. Due to the large number of important locations served, this line is extremely busy, with a daily ridership of over 1,000,000 passengers. Generally, the line runs at grade beside the Shanghai–Hangzhou railway in the south, underground in the city center and elevated on the second deck of the North–South Elevated Road in the North. The line is colored red on system maps.

The Shanghai Metro (Chinese: 上海地铁; pinyin: Shànghǎi Dìtiě; Shanghainese: Zaon6he5 Di6thiq7) is a rapid transit system in Shanghai, operating urban and suburban transit services to 14 of its 16 municipal districts and to the neighboring township of Huaqiao, in Kunshan, Jiangsu Province.