diff --git a/.changelog/21465.txt b/.changelog/21465.txt
new file mode 100644
index 00000000000..74a2705a30c
--- /dev/null
+++ b/.changelog/21465.txt
@@ -0,0 +1,3 @@
+```release-note:bug-fix
+resource/aws_appstream_fleet: Use `image_arn` when specified
+```
\ No newline at end of file
diff --git a/internal/service/appstream/fleet.go b/internal/service/appstream/fleet.go
index 759797d340f..9e8798263d2 100644
--- a/internal/service/appstream/fleet.go
+++ b/internal/service/appstream/fleet.go
@@ -229,6 +229,10 @@ func resourceFleetCreate(ctx context.Context, d *schema.ResourceData, meta inter
 		input.ImageName = aws.String(v.(string))
 	}
 
+	if v, ok := d.GetOk("image_arn"); ok {
+		input.ImageArn = aws.String(v.(string))
+	}
+
 	if v, ok := d.GetOk("iam_role_arn"); ok {
 		input.IamRoleArn = aws.String(v.(string))
 	}
diff --git a/internal/service/appstream/fleet_test.go b/internal/service/appstream/fleet_test.go
index 941f6dd1387..755e90adc9b 100644
--- a/internal/service/appstream/fleet_test.go
+++ b/internal/service/appstream/fleet_test.go
@@ -318,6 +318,9 @@ func testAccFleetCompleteConfig(name, description, fleetType, instanceType strin
 	return acctest.ConfigCompose(
 		acctest.ConfigAvailableAZsNoOptIn(),
 		fmt.Sprintf(`
+data "aws_region" "current" {}
+data "aws_partition" "current" {}
+
 resource "aws_vpc" "test" {
   cidr_block = "10.0.0.0/16"
 }
@@ -331,7 +334,7 @@ resource "aws_subnet" "test" {
 
 resource "aws_appstream_fleet" "test" {
   name       = %[1]q
-  image_name = "Amazon-AppStream2-Sample-Image-02-04-2019"
+  image_arn = "arn:${data.aws_partition.current.partition}:appstream:${data.aws_region.current.name}::image/Amazon-AppStream2-Sample-Image-02-04-2019"
 
   compute_capacity {
     desired_instances = 1