Line 12 is an east–west line of the Shanghai Metro network. It runs from Jinhai Road in Pudong to Qixin Road in Minhang District. The first section from Tiantong Road to Jinhai Road opened on 29 December 2013, and additional stations up to Qufu Road were in operation by 10 May 2014. The remaining stations opened on 19 December 2015. Since the opening of the extension in December 2015, Line 12 has the most interchanges with other metro lines in the Shanghai Metro. The line is colored forest green 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.