Line 2 (Linea Due in Italian), is a subway line serving Milan, Italy, operated by ATM as part of the Milan Metro.

The line has the southernmost and easternmost stations on the network (Assago Forum and Gessate).

The first part of the line, from Caiazzo to Cascina Gobba, was opened in September 1969.

After few years, in 1972, the section was included in the newly born Metro line.

The line, 40.4-kilometre (25.1 mi) long with 35 stations, has a central section that runs from Cascina Gobba to Famagosta, and forks at both ends.

ET245 are formed by three-car consists, with Bo-Bo powered units at both ends and a car between them; normally, two consists are coupled to form a single train.