The 43rd Separate Mechanized Brigade (Ukrainian: 43 окрема механізована бригада) is a brigade of the Ukrainian Ground Forces formed in 2023 on the basis of a mechanized battalion from 93rd Mechanized Brigade. The brigade is currently equipped with T-64BVs, BMP-1s, M113s and 2S1 Gvozdikas.

The brigade is at the stage of formation as of April 2023.^[1] The brigade has also notably been providing humanitarian aid to Ukrainian civilians.^[2] The brigade was involved in the 2023 Ukrainian counteroffensive.^[3]

As of 2024, the brigade's structure is as follows:

• 43rd Mechanized Brigade
  • Headquarters & Headquarters Company
  • 1st Mechanized Battalion
  • 2nd Mechanized Battalion
  • 3rd Mechanized Battalion
  • 413th Separate Rifle Battalion
  • Tank Battalion
  • Attack Drone Company "Heavenly Mara"
  • Attack Drone Company "Korax"
  • Artillery Group
    • Control and Target Acquisition Battery
    • 1st Self-propelled Artillery Division (2S1 Gvozdika)
    • 2nd Self-propelled Artillery Division (2S1 Gvozdika)
    • 3rd Multiple Rocket Launcher Battery (BM-21 Grad)
    • Anti-tank Company
  • Anti-Aircraft Defense Battalion
  • Reconnaissance Company
    • Sky Ghost Drone Unit
  • Engineer Battalion
  • Logistic Battalion
  • Signal Company
  • Maintenance Battalion
  • Radar Company
  • Medical Company
  • Chemical, Biological, Radiological and Nuclear Defense Company