The Class DD14 (DD14形) was a B'B' wheel arrangement diesel-hydraulic locomotive type operated in Japan as a self-propelled rotary snowplough unit from 1961 to 2015 by the national railway company Japanese National Railways (JNR), and later by East Japan Railway Company (JR East).

One engine could be used for propulsion with the other driving the rotary snowplough unit, giving a snow-clearing capacity of approximately 3,000 tonnes per hour, or the unit could be operated in multiple with a second locomotive allowing both engines to drive the rotary snowplough, giving a snow-clearing capacity of approximately 4,000 tonnes per hour.

[1] By 2005, only nine locomotives remained in service, all operated by JR East.

[2] The last remaining locomotives in service, DD14 327 and 332, based at JR East's Nagaoka Depot, made their final run on 24 February 2014.

[3] As of 2012[update], three Class DD14 locomotives are preserved in Japan, with one locomotive sold to Taiwan High Speed Rail (THSR) in Taiwan.