diff --git a/CHANGES.rst b/CHANGES.rst
index f814e5f2..03810d55 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -6,8 +6,10 @@ Here you can see the full list of changes between each Cerberus release.
 In Development
 --------------
 
-- Update README link. Make it point to the new PYPI website (Frank
-  Sachsenheim).
+- New: The ``contains`` rule. (Frank Sachsenheim)
+
+- Update README link. Make it point to the new PyPI website. (Frank
+  Sachsenheim)
 
 Version 1.2
 -----------
@@ -23,8 +25,8 @@ Released on April 12, 2018.
   (Frank Sachsenheim)
 - New: Add errors.MAPPING_SCHEMA on errors within subdocuments.
   (Frank Sachsenheim)
-- New: Support for Types Definitions, which allow quick types check on the fly
-  (Frank Sachsenheim).
+- New: Support for Types Definitions, which allow quick types check on the fly.
+  (Frank Sachsenheim)
 
 - Fix: Simplify the tests with Docker by using a volume for tox environments.
   (Frank Sachsenheim)
@@ -43,7 +45,7 @@ Released on April 12, 2018.
   Closes :issue:`269`. (Frank Sachsenheim)
 - Fix: A dependency is not considered satisfied if it has a null value.
   Closes :issue:`305`. (Frank Sachsenheim)
-- Override ``UnvalidatedSchema.copy`` (Peter Demin).
+- Override ``UnvalidatedSchema.copy``. (Peter Demin)
 - Fix: README link. (Gabriel Wainer)
 - Fix: Regression: allow_unknown causes dictionary validation to fail with
   a KeyError. Closes :issue:`302`. (Frank Sachsenheim)
diff --git a/cerberus/errors.py b/cerberus/errors.py
index 4c497eeb..e7d66ea0 100644
--- a/cerberus/errors.py
+++ b/cerberus/errors.py
@@ -54,6 +54,7 @@
 UNALLOWED_VALUES = ErrorDefinition(0x45, 'allowed')
 FORBIDDEN_VALUE = ErrorDefinition(0x46, 'forbidden')
 FORBIDDEN_VALUES = ErrorDefinition(0x47, 'forbidden')
+MISSING_MEMBERS = ErrorDefinition(0x48, 'contains')
 
 # other
 NORMALIZATION = ErrorDefinition(0x60, None)
@@ -461,6 +462,7 @@ class BasicErrorHandler(BaseErrorHandler):
                 0x45: "unallowed values {0}",
                 0x46: "unallowed value {value}",
                 0x47: "unallowed values {0}",
+                0x48: "missing members {0}",
 
                 0x61: "field '{field}' cannot be coerced: {0}",
                 0x62: "field '{field}' cannot be renamed: {0}",
diff --git a/cerberus/tests/test_validation.py b/cerberus/tests/test_validation.py
index 1f828fac..e09b3c4f 100644
--- a/cerberus/tests/test_validation.py
+++ b/cerberus/tests/test_validation.py
@@ -1577,3 +1577,21 @@ def test_allow_unknown_with_oneof_rules(validator):
     # check that allow_unknown is actually applied
     document = {'test': {'known': 's', 'unknown': 'asd'}}
     assert_success(document, validator=validator)
+
+
+@mark.parametrize('constraint',
+                  (('Graham Chapman', 'Eric Idle'), 'Terry Gilliam'))
+def test_contains(constraint):
+    validator = Validator({'actors': {'contains': constraint}})
+
+    document = {'actors': ('Graham Chapman', 'Eric Idle', 'Terry Gilliam')}
+    assert validator(document)
+
+    document = {
+        'actors': ('Eric idle', 'Terry Jones', 'John Cleese', 'Michael Palin')
+    }
+    assert not validator(document)
+    assert errors.MISSING_MEMBERS in validator.document_error_tree['actors']
+    missing_actors = \
+        validator.document_error_tree['actors'][errors.MISSING_MEMBERS].info[0]
+    assert any(x in missing_actors for x in ('Eric Idle', 'Terry Gilliam'))
diff --git a/cerberus/validator.py b/cerberus/validator.py
index 27a29053..39a0d8fc 100644
--- a/cerberus/validator.py
+++ b/cerberus/validator.py
@@ -964,6 +964,22 @@ def _validate_allowed(self, allowed_values, field, value):
             if value not in allowed_values:
                 self._error(field, errors.UNALLOWED_VALUE, value)
 
+    def _validate_contains(self, expected_values, field, value):
+        # just to omit warnings about missing validation schema:
+        """ {'empty': True } """
+        if not isinstance(value, Iterable):
+            return
+
+        if (not isinstance(expected_values, Iterable) or
+                isinstance(expected_values, _str_type)):
+            expected_values = set((expected_values,))
+        else:
+            expected_values = set(expected_values)
+
+        missing_values = expected_values - set(value)
+        if missing_values:
+            self._error(field, errors.MISSING_MEMBERS, missing_values)
+
     def _validate_dependencies(self, dependencies, field, value):
         """ {'type': ('dict', 'hashable', 'list'),
              'validator': 'dependencies'} """
diff --git a/docs/validation-rules.rst b/docs/validation-rules.rst
index e45bf3e6..67c7a5a6 100644
--- a/docs/validation-rules.rst
+++ b/docs/validation-rules.rst
@@ -61,6 +61,31 @@ Validates if *any* of the provided constraints validates the field. See `\*of-ru
 
 .. versionadded:: 0.9
 
+contains
+--------
+This rule validates the a container object contains all of the defined items.
+
+.. doctest::
+
+    >>> document = {'states': ['peace', 'love', 'unity']}
+
+    >>> schema = {'states': {'contains': 'peace'}}
+    >>> v.validate(document, schema)
+    True
+
+    >>> schema = {'states': {'contains': 'greed'}}
+    >>> v.validate(document, schema)
+    False
+
+    >>> schema = {'states': {'contains': ['love', 'unity']}}
+    >>> v.validate(document, schema)
+    True
+
+    >>> schema = {'states': {'contains': ['love', 'laugh']}}
+    >>> v.validate(document, schema)
+    False
+
+
 .. _dependencies:
 
 dependencies