diff --git a/changelogs/fragments/pdbadmin.yml b/changelogs/fragments/pdbadmin.yml
new file mode 100644
index 000000000..15730d2cc
--- /dev/null
+++ b/changelogs/fragments/pdbadmin.yml
@@ -0,0 +1,3 @@
+---
+minor_changes:
+  - "oradb_manage_pdb: added missing defaults for pdbadmin_user and pdbadmin_password (oravirt#426)"
diff --git a/extensions/molecule/shared_config/inventory/group_vars/all/oracle_db.yml b/extensions/molecule/shared_config/inventory/group_vars/all/oracle_db.yml
index 98728197b..70091808b 100644
--- a/extensions/molecule/shared_config/inventory/group_vars/all/oracle_db.yml
+++ b/extensions/molecule/shared_config/inventory/group_vars/all/oracle_db.yml
@@ -164,6 +164,7 @@ oracle_pdbs:
   - cdb: DB1
     home: db19-si-ee
     pdb_name: ORCLPDB
+    pdbadmin_user: PDBROOT
     listener_port: 1521
     state: present
     datafile_dest: /u01/app/oracle/oradata
diff --git a/extensions/molecule/shared_config/inventory/group_vars/all/password.yml b/extensions/molecule/shared_config/inventory/group_vars/all/password.yml
index 1750c7702..7bf3fabd9 100644
--- a/extensions/molecule/shared_config/inventory/group_vars/all/password.yml
+++ b/extensions/molecule/shared_config/inventory/group_vars/all/password.yml
@@ -3,8 +3,8 @@ oracle_wallet_password:
   wallet1: "aA_{{ ansible_machine_id }}"
 
 default_dbpass: Oracle_123
-# dbpasswords:
-#   DB1:
-#     sys: Oracle_123
-#     ORCLPDB:
-#       sys: Oracle_123
+dbpasswords:
+  DB1:
+    SYS: Oracle123
+    ORCLPDB:
+      PDBROOT: pdb
diff --git a/roles/oradb_manage_pdb/README.md b/roles/oradb_manage_pdb/README.md
index 9d5e3219f..b8b2a5fca 100644
--- a/roles/oradb_manage_pdb/README.md
+++ b/roles/oradb_manage_pdb/README.md
@@ -5,6 +5,9 @@ Manage pluggable databases in Oracle
 ## Table of content
 
 - [Requirements](#requirements)
+- [Default Variables](#default-variables)
+  - [pdbadmin_password](#pdbadmin_password)
+  - [pdbadmin_user](#pdbadmin_user)
 - [Discovered Tags](#discovered-tags)
 - [Dependencies](#dependencies)
 - [License](#license)
@@ -16,6 +19,32 @@ Manage pluggable databases in Oracle
 
 - Minimum Ansible version: `2.14.0`
 
+## Default Variables
+
+### pdbadmin_password
+
+Password for pdb_admin user.
+
+#### Default value
+
+```YAML
+pdbadmin_password: >-
+  {{ dbpasswords[odb.1.cdb][odb.1.pdb_name][pdbadmin_user] | default(default_dbpass)
+  }}
+```
+
+### pdbadmin_user
+
+Default pdb_admin user for newly created PDBs.
+
+Could be set in `oracle_pdbs` to define different pdb_admin user for each PDB.
+
+#### Default value
+
+```YAML
+pdbadmin_user: >-
+  {{ odb[1].pdbadmin_user | default('PDBADMIN') }}
+```
 
 ## Discovered Tags
 
diff --git a/roles/oradb_manage_pdb/defaults/main.yml b/roles/oradb_manage_pdb/defaults/main.yml
index ed97d539c..c80b794e2 100644
--- a/roles/oradb_manage_pdb/defaults/main.yml
+++ b/roles/oradb_manage_pdb/defaults/main.yml
@@ -1 +1,14 @@
 ---
+# @var pdbadmin_user:description: >
+# Default pdb_admin user for newly created PDBs.
+#
+# Could be set in `oracle_pdbs` to define different pdb_admin user for each PDB.
+# @end
+pdbadmin_user: >-
+  {{ odb[1].pdbadmin_user | default('PDBADMIN') }}
+
+# @var pdbadmin_password:description: >
+# Password for pdb_admin user.
+# @end
+pdbadmin_password: >-
+  {{ dbpasswords[odb.1.cdb][odb.1.pdb_name][pdbadmin_user] | default(default_dbpass) }}