Brigadier (Brig) is a senior rank in the Sri Lanka Army.

The rank has a NATO rank code of OF-6, equivalent to Commodore in the Sri Lanka Navy and Air Commodore in the Sri Lanka Air Force.

In the Sri Lanka Army, brigadier is the highest field officer rank (hence the absence of the word "general"), whereas brigadier-general is the lowest "general" rank in many armies.

The rank insignia for a Brigadier is a Sri Lanka emblem over three "pips", in the British style.

An officer serving as a Brigadier would be retired after four years in the substantive rank, which is the maximum permissible service in the rank, due to lack of vacancies or not been selected for further career progression.