The Eidan Chiyoda Line (営団千代田線) is a metro line in Tokyo, Japan, administered by the Teito Rapid Transit Authority. Its colour on maps is dark green.

The 21.9km line serves the wards of Adachi, Arakawa, Bunkyō, Chiyoda, Minato and Shibuya. There is also a short stretch of tunnel in Taitō ward.

The first stretch of line was opened on December 20th, 1969 between Kita-Senjū and Ōtemachi. The line was almost completed by October 10, 1972 when it reached Yoyogi-Kōen, although the 1km section between there and Yoyogi-Uehara_Station was not completed until March 31st, 1978.

Chiyoda Line trains interoperate with the JR Jōban Line from Ayase Station and with the Odaykū Line from Yoyogi-Uehara.

Station Transfers
Kita-Ayase
Ayase

Kita-Senjū Eidan Hibiya Line
Machiya Toden Arakawa Line
Nishi-Nippori Yamanote Line
Sendagi
Nezu
Yushima
Shin-Ochanomizu Station At Ogawamachi: Toei Shinjuku Line
At Awajichō: Eidan Marunouchi Line
Ōtemachi Eidan Hanzōmon Line, Eidan Marunouchi Line, Toei Mita Line, Eidan Tōzai Line
Hibiya Station Eidan Hibiya Line, Toei Mita Line
Kasumigaseki Station Eidan Hibiya Line, Eidan Marunouchi Line
Kokkai-Gijidōmae Eidan Marunouchi Line
Akasaka
Nogizaka
Omotesandō Eidan Ginza Line, Eidan Hanzōmon Line
Meiji Jingūmae At Harajuku: Yamanote Line
Yoyogi-Kōen
Yoyogi-Uehara Odaykū Line