| Unit Name: | 4th Separate Motor Rifle Brigade |
| Native Name: | 4-я отдельная мотострелковая бригада |
| Dates: | 2014–present |
| Allegiance: | Luhansk People's Republic (2014–2022) Russia (2022–present) |
| Branch: | LPR People's Militia (2014–2022) |
| Role: | Motorized Brigade |
| Command Structure: | 3rd Guards Combined Arms Army |
| Garrison: | Alchevsk (2014 – April 2017) Khrustalnyi (April 2017 – present) |
| Battles: |
The 4th Separate Motor Rifle Brigade (ru|4-я отдельная мотострелковая бригада, 4 омсбр; Military Unit Number 74347) is a military unit of Russian Ground Forces. Until January 1, 2023, it was part of the Luhansk People's Militia. It is attached to the 3rd Guards Combined Arms Army.
The brigade was formed in 2014. It took part in the War in Donbas.[1] The brigade's garrison was in Alchevsk.[2] In April 2017, the brigade moved its garrison to Khrustalnyi.[3]
The brigade took part in the battle of Bakhmut in the Klishchiivka sector where it suffered heavy casualties including the brigade's commander Vyacheslav Makarov.[4] [5] In January 2023 it became attached to the 2nd Army Corps.[6] On 10 May 2024, the Institute for the Study of War reported that the brigade is operating near the village of Ivanivske.[7] The brigade is currently involved in the battle of Chasiv Yar.[8]