diff --git a/toscaparser/substitution_mappings.py b/toscaparser/substitution_mappings.py
index 10641433..95dc4e21 100644
--- a/toscaparser/substitution_mappings.py
+++ b/toscaparser/substitution_mappings.py
@@ -32,8 +32,8 @@ class SubstitutionMappings(object):
     implementation of a Node type.
     '''
 
-    SECTIONS = (NODE_TYPE, REQUIREMENTS, CAPABILITIES) = \
-               ('node_type', 'requirements', 'capabilities')
+    SECTIONS = (NODE_TYPE, REQUIREMENTS, CAPABILITIES, PROPERTIES) = \
+               ('node_type', 'requirements', 'capabilities', 'properties')
 
     OPTIONAL_OUTPUTS = ['tosca_id', 'tosca_name', 'state']
 
@@ -49,6 +49,7 @@ class SubstitutionMappings(object):
 
         self._capabilities = None
         self._requirements = None
+        self._properties = None
 
     @property
     def type(self):
@@ -72,6 +73,10 @@ class SubstitutionMappings(object):
     def requirements(self):
         return self.sub_mapping_def.get(self.REQUIREMENTS)
 
+    @property
+    def properties(self):
+        return self.sub_mapping_def.get(self.PROPERTIES)
+
     @property
     def node_definition(self):
         return NodeType(self.node_type, self.custom_defs)
@@ -85,6 +90,7 @@ class SubstitutionMappings(object):
         self._validate_inputs()
         self._validate_capabilities()
         self._validate_requirements()
+        self._validate_properties()
         self._validate_outputs()
 
     def _validate_keys(self):
@@ -191,6 +197,22 @@ class SubstitutionMappings(object):
                 #    UnknownFieldError(what='SubstitutionMappings',
                 #                      field=req))
 
+    def _validate_properties(self):
+        """validate the properties of substitution mappings."""
+        # The properties in the substitution_mappings must be present
+        # in the node template properties.
+        tpls_properties = self.sub_mapping_def.get(self.PROPERTIES)
+        node_properties = \
+            self.sub_mapped_node_template.get_properties_objects() \
+            if self.sub_mapped_node_template else None
+        for req in node_properties if node_properties else []:
+            if (tpls_properties and
+                    req not in list(tpls_properties.keys())):
+                pass
+                # ExceptionCollector.appendException(
+                #    UnknownFieldError(what='SubstitutionMappings',
+                #                      field=req))
+
     def _validate_outputs(self):
         """validate the outputs of substitution mappings.
 
diff --git a/toscaparser/tests/data/topology_template/validate/test_example_app_substitution_mappings.yaml b/toscaparser/tests/data/topology_template/validate/test_example_app_substitution_mappings.yaml
index 718022a0..208cc316 100644
--- a/toscaparser/tests/data/topology_template/validate/test_example_app_substitution_mappings.yaml
+++ b/toscaparser/tests/data/topology_template/validate/test_example_app_substitution_mappings.yaml
@@ -39,6 +39,8 @@ topology_template:
 
   substitution_mappings:
     node_type: example.app
+    properties:
+      receiver_port: 8080
 
   node_templates:
     app: