Hellenic Train S.A., formerly TrainOSE S.A. (Greek: ΤραινΟΣΕ Α.Ε.), is a private railway company in Greece which operates passenger and freight trains on OSE lines. Hellenic Train employs train crews, operators and manages most of the rail services throughout the Greek railway network, leasing rolling stock owned by GAIAOSE except for ETR 470 trains.
The company was a subsidiary of the Hellenic Railways Organisation (OSE) until 2008, when it became an independent state-owned company until its privatisation in 2017. TrainOSE was acquired in September 2017 by the Italian national railway company Ferrovie dello Stato Italiane. In 2022 the company rebranded as Hellenic Train.