diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4e104a5640e..a87533242f9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -32,6 +32,7 @@ release.
 
 - Add details for filling semantic conventions for AWS Lambda ([#1442](https://github.com/open-telemetry/opentelemetry-specification/pull/1442))
 - Update semantic conventions to distinguish between int and double ([#1550](https://github.com/open-telemetry/opentelemetry-specification/pull/1550))
+- Add semantic convention for AWS ECS task revision ([#1581](https://github.com/open-telemetry/opentelemetry-specification/pull/1581))
 
 ### Compatibility
 
diff --git a/semantic_conventions/resource/cloud_provider/aws/ecs.yaml b/semantic_conventions/resource/cloud_provider/aws/ecs.yaml
index 3c8b0d72268..7bc7610baed 100644
--- a/semantic_conventions/resource/cloud_provider/aws/ecs.yaml
+++ b/semantic_conventions/resource/cloud_provider/aws/ecs.yaml
@@ -35,4 +35,9 @@ groups:
         brief: >
           The task definition family this task definition is a member of.
         examples: ['opentelemetry-family']
+      - id: task.revision
+        type: string
+        brief: >
+          The revision for this task definition.
+        examples: ["8", "26"]
       
diff --git a/specification/resource/semantic_conventions/cloud_provider/aws/ecs.md b/specification/resource/semantic_conventions/cloud_provider/aws/ecs.md
index 5055702d4e6..fd17affac11 100644
--- a/specification/resource/semantic_conventions/cloud_provider/aws/ecs.md
+++ b/specification/resource/semantic_conventions/cloud_provider/aws/ecs.md
@@ -14,6 +14,7 @@
 | `aws.ecs.launchtype` | string | The [launch type](https://docs.aws.amazon.com/AmazonECS/latest/developerguide/launch_types.html) for an ECS task. | `ec2`; `fargate` | No |
 | `aws.ecs.task.arn` | string | The ARN of an [ECS task definition](https://docs.aws.amazon.com/AmazonECS/latest/developerguide/task_definitions.html). | `arn:aws:ecs:us-west-1:123456789123:task/10838bed-421f-43ef-870a-f43feacbbb5b` | No |
 | `aws.ecs.task.family` | string | The task definition family this task definition is a member of. | `opentelemetry-family` | No |
+| `aws.ecs.task.revision` | string | The revision for this task definition. | `8`; `26` | No |
 
 `aws.ecs.launchtype` MUST be one of the following: