diff --git a/changelogs/fragments/518-aws_glue_connection-do-not-lowercase-connection-parameters.yml b/changelogs/fragments/518-aws_glue_connection-do-not-lowercase-connection-parameters.yml
new file mode 100644
index 00000000000..abe1b4702a6
--- /dev/null
+++ b/changelogs/fragments/518-aws_glue_connection-do-not-lowercase-connection-parameters.yml
@@ -0,0 +1,4 @@
+minor_changes:
+- aws_glue_connection - added new ``raw_connection_parameters`` return key which doesn't snake case the connection parameters (https://github.com/ansible-collections/community.aws/pull/518).
+deprecated_features:
+- aws_glue_connection - the ``connection_parameters`` return key has been deprecated and will be removed in a release after 2024-06-01, it is being replaced by the ``raw_connection_parameters`` key (https://github.com/ansible-collections/community.aws/pull/518).
diff --git a/plugins/modules/glue_connection.py b/plugins/modules/glue_connection.py
index c8adb83fc66..1f278d66b3b 100644
--- a/plugins/modules/glue_connection.py
+++ b/plugins/modules/glue_connection.py
@@ -109,10 +109,12 @@
 
 RETURN = r'''
 connection_properties:
-    description: A dict of key-value pairs used as parameters for this connection.
+    description:
+        - (deprecated) A dict of key-value pairs (converted to lowercase) used as parameters for this connection.
+        - This return key has been deprecated, and will be removed in a release after 2024-06-01.
     returned: when state is present
     type: dict
-    sample: {'JDBC_CONNECTION_URL':'jdbc:mysql://mydb:3306/databasename','USERNAME':'x','PASSWORD':'y'}
+    sample: {'jdbc_connection_url':'jdbc:mysql://mydb:3306/databasename','username':'x','password':'y'}
 connection_type:
     description: The type of the connection.
     returned: when state is present
@@ -149,6 +151,11 @@
     returned: when state is present
     type: dict
     sample: {'subnet-id':'subnet-aabbccddee'}
+raw_connection_properties:
+    description: A dict of key-value pairs used as parameters for this connection.
+    returned: when state is present
+    type: dict
+    sample: {'JDBC_CONNECTION_URL':'jdbc:mysql://mydb:3306/databasename','USERNAME':'x','PASSWORD':'y'}
 '''
 
 # Non-ansible imports
@@ -309,7 +316,13 @@ def create_or_update_glue_connection(connection, connection_ec2, module, glue_co
     if changed and not module.check_mode:
         glue_connection = _await_glue_connection(connection, module)
 
-    module.exit_json(changed=changed, **camel_dict_to_snake_dict(glue_connection or {}))
+    if glue_connection:
+        module.deprecate("The 'connection_properties' return key is deprecated and will be replaced"
+                         " by 'raw_connection_properties'. Both values are returned for now.",
+                         date='2024-06-01', collection_name='community.aws')
+        glue_connection['RawConnectionProperties'] = glue_connection['ConnectionProperties']
+
+    module.exit_json(changed=changed, **camel_dict_to_snake_dict(glue_connection or {}, ignore_list=['RawConnectionProperties']))
 
 
 def delete_glue_connection(connection, module, glue_connection):
diff --git a/tests/integration/targets/glue_connection/tasks/test_connection_network.yml b/tests/integration/targets/glue_connection/tasks/test_connection_network.yml
index ce8af4d2f21..2300155851b 100644
--- a/tests/integration/targets/glue_connection/tasks/test_connection_network.yml
+++ b/tests/integration/targets/glue_connection/tasks/test_connection_network.yml
@@ -52,7 +52,7 @@
         name: "{{ resource_prefix }}"
         availability_zone: "{{ aws_region }}a"
         connection_properties:
-          jdbc_enforce_ssl: "false"
+          JDBC_ENFORCE_SSL: "false"
         connection_type: NETWORK
         description: Test connection
         security_groups:
@@ -73,7 +73,7 @@
         name: "{{ resource_prefix }}"
         availability_zone: "{{ aws_region }}a"
         connection_properties:
-          jdbc_enforce_ssl: "false"
+          JDBC_ENFORCE_SSL: "false"
         connection_type: NETWORK
         description: Test connection
         security_groups:
@@ -101,18 +101,19 @@
           - glue_connection.changed
           - glue_connection.name == connection_info["Connection"]["Name"]
           - glue_connection.description == connection_info["Connection"]["Description"]
-          - glue_connection.connection_properties == connection_info["Connection"]["ConnectionProperties"]
+          - glue_connection.raw_connection_properties == connection_info["Connection"]["ConnectionProperties"]
           - glue_connection.connection_type == connection_info["Connection"]["ConnectionType"]
           - glue_connection.physical_connection_requirements.subnet_id == connection_info["Connection"]["PhysicalConnectionRequirements"]["SubnetId"]
           - glue_connection.physical_connection_requirements.security_group_id_list == connection_info["Connection"]["PhysicalConnectionRequirements"]["SecurityGroupIdList"]
           - glue_connection.physical_connection_requirements.availability_zone == connection_info["Connection"]["PhysicalConnectionRequirements"]["AvailabilityZone"]
+          - glue_connection.raw_connection_properties == connection_info["Connection"]["ConnectionProperties"]
 
     - name: Create Glue connection (idempotent) (check mode)
       aws_glue_connection:
         name: "{{ resource_prefix }}"
         availability_zone: "{{ aws_region }}a"
         connection_properties:
-          jdbc_enforce_ssl: "false"
+          JDBC_ENFORCE_SSL: "false"
         connection_type: NETWORK
         description: Test connection
         security_groups:
@@ -152,7 +153,7 @@
         name: "{{ resource_prefix }}"
         availability_zone: "{{ aws_region }}a"
         connection_properties:
-          jdbc_enforce_ssl: "false"
+          JDBC_ENFORCE_SSL: "false"
         connection_type: NETWORK
         description: Test connection
         security_groups:
@@ -191,7 +192,7 @@
         name: "{{ resource_prefix }}"
         availability_zone: "{{ aws_region }}a"
         connection_properties:
-          jdbc_enforce_ssl: "false"
+          JDBC_ENFORCE_SSL: "false"
         connection_type: NETWORK
         description: Test connection modified
         security_groups:
@@ -220,18 +221,19 @@
           - glue_connection_update_check.changed
           - glue_connection_update_check.name == connection_info_update_check["Connection"]["Name"]
           - glue_connection_update_check.description == connection_info_update_check["Connection"]["Description"]
-          - glue_connection_update_check.connection_properties == connection_info_update_check["Connection"]["ConnectionProperties"]
+          - glue_connection_update_check.raw_connection_properties == connection_info_update_check["Connection"]["ConnectionProperties"]
           - glue_connection_update_check.connection_type == connection_info_update_check["Connection"]["ConnectionType"]
           - glue_connection_update_check.physical_connection_requirements.subnet_id == connection_info_update_check["Connection"]["PhysicalConnectionRequirements"]["SubnetId"]
           - glue_connection_update_check.physical_connection_requirements.security_group_id_list == connection_info_update_check["Connection"]["PhysicalConnectionRequirements"]["SecurityGroupIdList"]
           - glue_connection_update_check.physical_connection_requirements.availability_zone == connection_info_update_check["Connection"]["PhysicalConnectionRequirements"]["AvailabilityZone"]
+          - glue_connection_update_check.raw_connection_properties == connection_info_update_check["Connection"]["ConnectionProperties"]
 
     - name: Update Glue connection
       aws_glue_connection:
         name: "{{ resource_prefix }}"
         availability_zone: "{{ aws_region }}a"
         connection_properties:
-          jdbc_enforce_ssl: "false"
+          JDBC_ENFORCE_SSL: "false"
         connection_type: NETWORK
         description: Test connection modified
         security_groups:
@@ -259,11 +261,12 @@
           - glue_connection_update.changed
           - glue_connection_update.name == connection_info_update["Connection"]["Name"]
           - glue_connection_update.description == connection_info_update["Connection"]["Description"]
-          - glue_connection_update.connection_properties == connection_info_update["Connection"]["ConnectionProperties"]
+          - glue_connection_update.raw_connection_properties == connection_info_update["Connection"]["ConnectionProperties"]
           - glue_connection_update.connection_type == connection_info_update["Connection"]["ConnectionType"]
           - glue_connection_update.physical_connection_requirements.subnet_id == connection_info_update["Connection"]["PhysicalConnectionRequirements"]["SubnetId"]
           - glue_connection_update.physical_connection_requirements.security_group_id_list == connection_info_update["Connection"]["PhysicalConnectionRequirements"]["SecurityGroupIdList"]
           - glue_connection_update.physical_connection_requirements.availability_zone == connection_info_update["Connection"]["PhysicalConnectionRequirements"]["AvailabilityZone"]
+          - glue_connection_update.raw_connection_properties == connection_info_update["Connection"]["ConnectionProperties"]
 
     - name: Delete Glue connection (check mode)
       aws_glue_connection: