Midorii Station features one islandplatform handling two tracks. The station building is located south-west of the platofrm, and a railway crossing connects the platform and station building. The station features a ticket office. A large parking lot and bus stop is situated outside the station. Despite being the largest station in Asaminami-ku, Midorii Station is very simple in design and size when compared to Ōmachi Station and Shimo-Gion Station.