The Tokyo Metropolitan Bureau of Transportation , also known as Toei (都営), is a bureau of the Tokyo Metropolitan Government which operates public transport services in Tokyo. Among its services, the Toei Subway is one of two rapid transit systems which make up the Tokyo subway system, the other being Tokyo Metro.

Two rapid transit systems operate in Tokyo: Tokyo Metro and the Toei Subway. Most of the network is located in the 23 special wards, with portions extending into Chiba and Saitama Prefectures. The subways are one part of Greater Tokyo's passenger rail network, with through service further connecting the subway to suburban railways in Western Tokyo and Kanagawa Prefecture.