The M7, officially referred to as the M7 Yıldız–Mahmutbey metro line is a rapid transit line of the Istanbul Metro system on the European part of Istanbul, Turkey. It is colored light pink on the maps and route signs. It is the first driverless rapid transit line of the European side of Istanbul.

The Istanbul Metro is a rapid transit railway network that serves the city of Istanbul, Turkey. Apart from the M11 line, which is operated by TCDD Taşımacılık, the system is operated by Metro Istanbul, a public enterprise controlled by the Istanbul Metropolitan Municipality. The oldest section of the metro is the M1 line, which opened in 1989. As of March 2024, the system now includes 158 stations in service, with 36 more under construction. Istanbul is the city with the 22nd longest metro line in the world and the 4th in Europe.