The Aoimori 703 series (青い森703系) is an electric multiple unit (EMU) train type operated by the third-sector railway operator Aoimori Railway on the Aoimori Railway Line in Aomori Prefecture, Japan, since March 2014.

[2] Passenger information is provided by LED displays above the doorways.

[1] The two sets on order were delivered from J-TREC's Yokohama factory to Aomori in November 2013.

[6] The two sets entered revenue service from the start of the revised timetable on 15 March 2014.

Effective the timetable revision on 18 March 2023, 703 series will operate as far south as Sannohe Station on the Aoimori Railway Line.