The Bex–Villars–Bretaye Railway (French: Chemin de fer Bex-Villars-Bretaye, BVB) is a metre gauge railway line operating between the towns of Bex and Villars-sur-Ollon and the Col de Bretaye mountain pass, situated in the Chablais region of southwest Switzerland.

Passengers making the full journey are required to change trains at Villars.

Since 1999 the line has been operated as part of the Transports Publics du Chablais and details from that date of investments are included under that heading.

[4] In 2013, this round trip was still being operated and was scheduled to depart Bévieux at 6:58 and return from Bex at 7:12, on weekdays only.

The passenger services on the line are operated by railcars (self-propelled railway vehicles; in French automotrice), either singly or with driving-trailer cars (voiture pilote) or the more recently built twin-unit railcars (automotrice-double) of class Beh4/8.