Kokkai-gijidō-mae Station (国会議事堂前駅, Kokkai-gijidō-mae-eki) is a subway station in Chiyoda, Tokyo, Japan, operated by the Tokyo subway operator Tokyo Metro. It is located adjacent to the National Diet Building.

The station name literally means "in front of the National Diet Building".

Kokkai-gijidō-mae Station is served by the following lines.

• Tokyo Metro Marunouchi Line (M-14)
• Tokyo Metro Chiyoda Line (C-07)

The station is also connected by underground passageways to Tameike-sannō Station, which is served by the Ginza and Namboku Lines, and it is possible to transfer between the two stations without passing through the ticket gates.

The Chiyoda Line platforms are 37.9 m underground, making this station the deepest in the Tokyo Metro network (although a number of stations on the Ōedo Line are farther underground).

1	M Marunouchi Line	for Ogikubo and Honancho
2	M Marunouchi Line	for Ikebukuro
3	C Chiyoda Line	for Omote-sando and Yoyogi-uehara Odakyu Odawara Line for Hon-Atsugi and Isehara
4	C Chiyoda Line	for Otemachi, Kita-senju, Ayase, and Kita-ayase JL Jōban Line (Local) for Abiko and Toride

• 
  Marunouchi Line concourse
• 
  Chiyoda Line platform
• 
  Marunouchi Line platforms

The station first opened on March 15, 1959, as a station on the Marunouchi Line. The Chiyoda Line platforms opened on October 20, 1972. It also became possible to transfer to the Ginza and Namboku lines via a passageway to the newly opened Tameike-Sannō Station which opened on September 30, 1997.

The station facilities were inherited by Tokyo Metro after the privatization of the Teito Rapid Transit Authority (TRTA) in 2004.

In fiscal 2019, this station and Tameike-sannō combined had an average of 150,922 passengers daily.

• National Diet Building
• Prime Minister's Official Residence (Japan)
• Cabinet Office
• Hibiya High School
• Hie Shrine
• The Capitol Hotel Tokyu

• Kokkai-gijidō-mae Station information (Tokyo Metro) (in Japanese)

35°40′27″N 139°44′43″E / 35.674119°N 139.745246°E / 35.674119; 139.745246