is a passenger railway station located in the city of Mitoyo, Kagawa Prefecture, Japan. It is operated by JR Shikoku and has the station number "D18".
Sanuki-Saida Station is served by JR Shikoku's Dosan Line and is located from the beginning of the line at .
The station, which is unstaffed, consists of a side platform and an island platform serving three tracks. A building adjacent to the side platform serves as a passenger waiting room. A pedestrian level crossing spanning two tracks gives access to the island platform. Parking and a bike shed are available.
Sanuki-Saida Station opened on 21 May 1923 when the then , operated by Japanese Government Railways (later becoming Japanese National Railways (JNR) was extended from to Sanuki-Saida. With the privatization of JNR on 1 April 1987, control of the station passed to JR Shikoku.