diff --git a/actions/java-gradle-build-jib/README.md b/actions/java-gradle-build-jib/README.md
index 2f79d9b80..bca7e1afd 100644
--- a/actions/java-gradle-build-jib/README.md
+++ b/actions/java-gradle-build-jib/README.md
@@ -4,15 +4,16 @@ This action builds an image tarball using [Jib Gradle](https://github.com/Google
 
 ## Input Parameters
 
-| Name                | Required | Default Value  |  Type   | Description                                                                                                   |
-| ------------------- | :------: | :------------: | :-----: | ------------------------------------------------------------------------------------------------------------- |
-| image-artifact-name |    ❌    | image-artifact | string  | Artifact name to upload tarball image, see <https://github.com/actions/upload-artifact>                       |
-| java-distribution   |    ❌    |   microsoft    | string  | [Java distribution](https://github.com/actions/setup-java#supported-distributions) to be installed            |
-| java-version        |    ❌    |       11       | string  | Java version to be installed                                                                                  |
-| gradle-version      |    ❌    |    wrapper     | string  | [Gradle version](https://github.com/gradle/gradle-build-action#use-a-specific-gradle-version) to be installed |
-| gradle-cache        |    ❌    |      true      | boolean | Whether Gradle caching is enabled or not                                                                      |
-| working-directory   |    ❌    |      "."       | string  | Working directory of your Gradle artifacts                                                                    |
-| download-lfs-files  |    ❌    |     false      | boolean | Whether the Git checkout action should resolve LFS files or not                                               |
+| Name                | Required | Default Value  |  Type   | Description                                                                                                                              |
+| ------------------- | :------: | :------------: | :-----: | ---------------------------------------------------------------------------------------------------------------------------------------- |
+| image-artifact-name |    ❌    | image-artifact | string  | Artifact name to upload tarball image, see <https://github.com/actions/upload-artifact>                                                  |
+| java-distribution   |    ❌    |   microsoft    | string  | [Java distribution](https://github.com/actions/setup-java#supported-distributions) to be installed                                       |
+| java-version        |    ❌    |       11       | string  | Java version to be installed                                                                                                             |
+| gradle-version      |    ❌    |    wrapper     | string  | [Gradle version](https://github.com/gradle/gradle-build-action#use-a-specific-gradle-version) to be installed                            |
+| gradle-cache        |    ❌    |      true      | boolean | Whether Gradle caching is enabled or not                                                                                                 |
+| working-directory   |    ❌    |      "."       | string  | Working directory of your Gradle artifacts                                                                                               |
+| download-lfs-files  |    ❌    |     false      | boolean | Whether the Git checkout action should resolve LFS files or not                                                                          |
+| subproject          |    ❌    |                | string  | The Gradle subproject for which the tarball image should be built (If not specified, a tarball image for the root project will be built) |
 
 ## Usage
 
diff --git a/actions/java-gradle-build-jib/action.yaml b/actions/java-gradle-build-jib/action.yaml
index b3a5fe7d8..7b4b5e45f 100644
--- a/actions/java-gradle-build-jib/action.yaml
+++ b/actions/java-gradle-build-jib/action.yaml
@@ -34,6 +34,9 @@ inputs:
     description: "Whether the Git checkout action should resolve LFS files or not. (Default is false)"
     required: false
     default: false
+  subproject:
+    description: "The Gradle subproject for which the tarball image should be built (If not specified, a tarball image for the root project will be built)"
+    required: false
 runs:
   using: "composite"
   steps:
@@ -51,7 +54,11 @@ runs:
         gradle-cache: ${{ inputs.gradle-cache }}
 
     - name: Build Docker image
-      run: ./gradlew --info --stacktrace jibBuildTar --image=${{ inputs.image-name }} -x test
+      run: |
+        ./gradlew ${{ inputs.subproject && format('{0}:', inputs.subproject) || '' }}jibBuildTar \
+          --info --stacktrace \
+          --image=${{ inputs.image-name }} \
+          -x test
       shell: bash
       working-directory: ${{ inputs.working-directory }}
 
@@ -59,5 +66,5 @@ runs:
       uses: actions/upload-artifact@v3
       with:
         name: ${{ inputs.image-artifact-name }}
-        path: build/jib-image.tar
+        path: ${{ inputs.subproject && format('{0}/', inputs.subproject) || '' }}build/jib-image.tar
         retention-days: 1