The Musashino Line (武蔵野線) is a railway line of the East Japan Railway Company (JR East). It links Tsurumi Station, Yokohama, Kanagawa and Nishi-funabashi Station, Funabashi, Chiba but only freight business between Tsurumi and Fuchūhommachi Station, Fuchu, Tokyo, called Musashino South Line, and the traveler is only between Fuchūhommachi and Nishi-Funabashi.

Trains interoperate Keiyōo Line at Nishi-Funabashi. They go to Tokyo Staion or Minami-funabashi Station. Some go to Kaihinmakuhari Station thru Minami-funabashi.

The line connects Nanbu Line at Fuchūhommachi, Chūō Line at Nishi-kokubunji Station, Seibu Ikebukuro Line at Shin-Akitsu Station, Tōbu Tōjō Line at Kita-Asaka Station, Saikyō Line at Musashi-Urawa Station, Keihin-Tōhoku Line at Minami-Urawa Station, Saitama Kōsoku Line at Higashi-Kawaguchi Station, Tōbu Isezaki Line at Minami-Koshigaya, Jōban Line and Sōbu Nagareyama Line at Shin-Matsudo Staion, Shinkeisei Line at Shin-Yahashira Station, and Sōbu Line, Keiyōo Line, Tokyo Metro Tōozai Line, Tōyōkōsoku Tōyō Line at Nishi-funabashi. It will connect Tsukuba Express Line at Minami-Nagareyama Station. But it doesn't connect Keio Line, Seibu Kokubunji Line, Seibu Haijima Line, Seibu Tamako Line and Seibu Shinjuku Line though it intersects them.