The Korail Class 331000 trains are commuter electric multiple units in South Korea used on the Gyeongui·Jungang Line.

The first batch of Class 331000 trains were introduced in 2009 for the opening of what was known the Gyeongui Line at the time.

The trains also use the same front end design as the third batch Class 321000 trains, but the exterior body was reverted to the standard, ribbed type stainless steel body seen on all new cars.

Trains 331-14~331-22 were manufactured and delivered in late 2013 to expand the rolling stock on the (at the time) Gyeongui Line.

These trains are only four cars long and operate on the Seoul Station branch of the Gyeongui–Jungang Line.