The section between Tachikawa and Ōme was opened in 1894 by the Ōme Railway as a gauge line, extended 2 km as a freight-only section to Hinatawada the following year. Passenger services were extended to Hinatawada in 1898, and the line was converted to in 1908. A further freight-only section opened to Miyanohira in 1914, and to Futamatao in 1920. Passenger services were extended to Miyanohira in 1923, the same year the entire line was electrified at 1,200 V DC. The line was further extended to Mitake in 1929, when the company changed its name to the Ōme Electric Railway Co. and the voltage raised to 1,500 V DC in 1930. Passenger services were extended to Mitake in 1935.