Shimo-Ochiai Station is served by the 47.5 km Seibu Shinjuku Line from Seibu-Shinjuku in Tokyo to Hon-Kawagoe in Saitama Prefecture.

[1] Located between Takadanobaba and Nakai, it is 3.2 km from the Seibu-Shinjuku terminus.

[1] During the daytime off-peak, the station is served by six trains per hour in either direction.

The station consists of two ground-level side platforms serving two tracks.

[3] In fiscal 2013, the station was the 64th busiest on the Seibu network with an average of 11,221 passengers daily.