diff --git a/README.md b/README.md
index 38e85c2..bf66993 100644
--- a/README.md
+++ b/README.md
@@ -55,6 +55,7 @@ module "localhost_function" {
 | bucket\_force\_destroy | When deleting the GCS bucket containing the cloud function, delete all objects in the bucket first. | bool | `"false"` | no |
 | bucket\_labels | A set of key/value label pairs to assign to the function source archive bucket. | map(string) | `<map>` | no |
 | bucket\_name | The name to apply to the bucket. Will default to a string of the function name. | string | `""` | no |
+| bucket\_prefix | The prefix of the bucket name for object subdirectory path. | string | `""` | no |
 | create\_bucket | Whether to create a new bucket or use an existing one. If false, `bucket_name` should reference the name of the alternate bucket to use. | bool | `"true"` | no |
 | description | The description of the function. | string | `"Processes events."` | no |
 | entry\_point | The name of a method in the function source which will be invoked when the function is executed. | string | n/a | yes |
diff --git a/main.tf b/main.tf
index c86a583..7c37f6e 100644
--- a/main.tf
+++ b/main.tf
@@ -59,7 +59,7 @@ resource "google_storage_bucket" "main" {
 }
 
 resource "google_storage_bucket_object" "main" {
-  name                = "${data.archive_file.main.output_md5}-${basename(data.archive_file.main.output_path)}"
+  name                = var.bucket_prefix != "" ? "${var.bucket_prefix}/${data.archive_file.main.output_md5}-${basename(data.archive_file.main.output_path)}" : "${data.archive_file.main.output_md5}-${basename(data.archive_file.main.output_path)}"
   bucket              = var.create_bucket ? google_storage_bucket.main[0].name : var.bucket_name
   source              = data.archive_file.main.output_path
   content_disposition = "attachment"
diff --git a/variables.tf b/variables.tf
index 5229486..294b659 100644
--- a/variables.tf
+++ b/variables.tf
@@ -112,6 +112,12 @@ variable "bucket_name" {
   description = "The name to apply to the bucket. Will default to a string of the function name."
 }
 
+variable "bucket_prefix" {
+  type        = string
+  default     = ""
+  description = "The prefix of the bucket name for object subdirectory path."
+}
+
 variable "create_bucket" {
   type        = bool
   default     = true