Shinshimashima Station (新島々駅, Shinshimashima-eki) is a railway station in Matsumoto, Nagano, Japan, operated by the private railway operating company Alpico Kōtsū.

Shinshimashima Station is the terminus of the Kamikōchi Line and is 14.4 kilometers from the opposing terminus of the line at Matsumoto Station.

The station has one dead-headed island platform serving two tracks.

The platforms are not numbered The station opened on 26 September 1924 as Akamatsu Station (赤松駅).

Due to damaged caused by the 1983 Typhoon 10, the line pass Shinshimashima Station was discontinued and replaced by a bus service, making this station the effective terminus of the line.