The station has an island platform serving two tracks for the Chūō Line on the third basement, an island platform serving two tracks for the Midōsuji Line on the second basement in the east of the platform for the Chūō Line, and two side platforms serving two tracks for the Yotsubashi Line on the first basement in the west of the platform for the Chūō Line.
"Semba-nishi (船場西)" has been shown on the station signs for the Midosuji Line and the Chuo Line since October 2011 to revive the traditional "Semba Brand" in the center of the city of Osaka. "Semba-higashi (船場東)" is shown on the station signs at adjacent Sakaisuji-Hommachi Station, but both names are not announced on the trains as they are not co-station names.
A connecting track is located between the Chuo Line and the Yotsubashi Line (completed in 2014). Morinomiya Workshop will be consolidated with Midorigi Workshop by 2015.