The Vaslui trolleybus system is a one route trolleybus network in the Romanian city of Vaslui.

The original 4.4 km (2.7 mi) network opened on 1 May 1994 and was operated by a fleet of five new Rocar 217E articulated trolleybuses. It closed on 7 July 2009. Construction on a depot commenced, but was never finished with buses being serviced on the street.^[2][3]

In August 2016, the network was extended by 2 km (1.2 mi) and the line reopened with the help of a European Union grant.^[1] Three Gräf & Stift GE112 M16 articulated trolleybuses were purchased from Salzburg.^[3] The system was soon closed down again due to bad state second hand trolleybuses, inadequate usage, lack of personnel. It was then decided to acquire new modern trolleybuses, with low floor, air conditioning and various comfort features.

In 2021, 10 new trolleybuses were contracted from the Polish manufacturer Solaris. In 2023, between January and March, all 10 trolleybuses were delivered. The model is Solaris Trollino 12M which were painted in light green. They will be put into service after training of personnel (drivers, maintenance mechanics,etc), various garage modifications and after some revisions of the overhead network and power supply station. On 4 August 2023, the system was reopened.^[4]