diff --git a/wagtail/wagtailadmin/blocks.py b/wagtail/wagtailadmin/blocks.py
index 53d04eac6..61d77a778 100644
--- a/wagtail/wagtailadmin/blocks.py
+++ b/wagtail/wagtailadmin/blocks.py
@@ -361,6 +361,19 @@ class RichTextBlock(FieldBlock):
     def render_basic(self, value):
         return mark_safe('<div class="rich-text">' + expand_db_html(value) + '</div>')
 
+class RawHTMLBlock(FieldBlock):
+    def __init__(self, required=True, help_text=None, max_length=None, min_length=None, **kwargs):
+        self.field = forms.CharField(
+            required=required, help_text=help_text, max_length=max_length, min_length=min_length,
+            widget = forms.Textarea)
+        super(RawHTMLBlock, self).__init__(**kwargs)
+
+    def render_basic(self, value):
+        return mark_safe(value)  # if it isn't safe, that's the site admin's problem for allowing raw HTML blocks in the first place...
+
+    class Meta:
+        icon = 'code'
+
 
 class ChooserBlock(FieldBlock):
     def __init__(self, required=True, **kwargs):