This line connects with the Nara Line, and when the important parts inspection or the thorough inspection of the train cars of the Keihanna Line is carried out, the cars are sent to the Goido rail yard using this connection line via the Higashi-Ikoma depot, Nara Line, Yamato-Saidaiji Station, Kintetsu Kashihara Line, Kashiharajingu-mae Station, the crossover in Yamato-Yagi Station and the Kintetsu Osaka Line.
奈良線とも線路がつながっているが、けいはんな線用車両の鉄道車両の検査重要部検査や鉄道車両の検査全般検査などはこの連絡線を利用して東生駒車庫～奈良線～大和西大寺駅～近鉄橿原線～橿原神宮前駅～大和八木駅構内の渡り線～近鉄大阪線経由で五位堂検修車庫に回送して行う。