The line is operated by six steel-bodied four-axle electric tramcars numbered 401-402 and 404-407.
Cars 401-405 were built in 1935 by Officine Meccaniche Stanga with Tecnomasio Italiano Brown Boveri electrical components.
Cars 406-407 were built in 1942 by the same companies to a similar design, although war-time shortages resulted in  a more basic interior and different window detail.
Car 403 was subsequently destroyed in an accident on 28 November 1975.

The cars take electricity from a 550 Volts DC overhead line.
Each car is 13.37 metres (43.9 ft) long, 2.5 metres (8.2 ft) wide and 3.45 metres (11.3 ft) high, with 50 seats and a total carrying capacity of 120 passengers.
They have four 25 kW (34 hp) motors, giving a maximum speed of 35 km/h (22 mph), and are equipped for rheostatic braking, in addition to air brakes, electro-magnetic track brakes and hand brakes.

Two of the original wooden-bodied four-wheel tramcars still exist.
The original car 1 was built in 1902, at Graz in Austria, by Grazer Waggonfabrik with electrical components from Österreichische Union-Elektrizitätsgesellschaft.
On the arrival of cars 401-407, it was converted into a works car numbered 411.
In 1992 it was restored to its original condition and sees occasional service as a museum car.
Car 6 has also survived and been recently restored, having been displayed as a static exhibit at the railway museum in Trieste Campo Marzio station.
The line is operated by six steel-bodied four-axle electric tramcars numbered 401-402 and 404-407. Cars 401-405 were built in 1935 by Officine Meccaniche Stanga with Tecnomasio Italiano Brown Boveri electrical components. Cars 406-407 were built in 1942 by the same companies to a similar design, although war-time shortages resulted in  a more basic interior and different window detail. Car 403 was subsequently destroyed in an accident on 28 November 1975.
The cars take electricity from a 550 Volts DC overhead line. Each car is 13.37 metres (43.9 ft) long, 2.5 metres (8.2 ft) wide and 3.45 metres (11.3 ft) high, with 50 seats and a total carrying capacity of 120 passengers. They have four 25 kW (34 hp) motors, giving a maximum speed of 35 km/h (22 mph), and are equipped for rheostatic braking, in addition to air brakes, electro-magnetic track brakes and hand brakes.
Two of the original wooden-bodied four-wheel tramcars still exist. The original car 1 was built in 1902, at Graz in Austria, by Grazer Waggonfabrik with electrical components from Österreichische Union-Elektrizitätsgesellschaft. On the arrival of cars 401-407, it was converted into a works car numbered 411. In 1992 it was restored to its original condition and sees occasional service as a museum car. Car 6 has also survived and been recently restored, having been displayed as a static exhibit at the railway museum in Trieste Campo Marzio station.
Trieste–Opicina tramway