Trenčín Electric Railway (TREŽ) is the name of the Slovakian 760 mm (2 ft 5+15⁄16 in) narrow-gauge rail transport line between Trenčianska Teplá and the town of Trenčianske Teplice in with tram vehicles operating on the track.

It is approximately 5.5 km long and consists of one inter-station section, while the only crossover called Kaňová was abolished in the second half of the 1990s.

It became a junction of the main railway line from Bratislava to Košice (5th TEN-T Corridor) and the spa town of Trenčianske Teplice.

Since the beginning of the 21st century, the whole system is constantly undermined by a possibly of decommissioning the line, which has so far been delayed.

By obtaining a license in the summer of 2015 and with the financial support of the Trenčín Self-Governing Region, TREŽ, n.o.