The Kyoto Municipal Subway 50 series (京都市営地下鉄50系, Kyōto-shiei chikatetsu 50-kei) is an electric multiple unit (EMU) commuter train type operated by the Kyoto Municipal Subway in Kyoto, Japan, since 1997.

[1] The 50 series was introduced in 1997 with 14 6-car sets built by the end of 1997 to coincide with the opening of the Tōzai Line.

[3] Passenger accommodation consists of longitudinal bench seating throughout.

[4] Priority seating and wheelchair space is provided on all vehicles.

The six-car trains are formed as follows, with four motored ("M") cars and two non-powered trailer cab ("Tc") cars.