diff --git a/renderer/fifty_ohm_html_renderer.py b/renderer/fifty_ohm_html_renderer.py
index 9400552..fa6a6ab 100644
--- a/renderer/fifty_ohm_html_renderer.py
+++ b/renderer/fifty_ohm_html_renderer.py
@@ -12,4 +12,7 @@ class FiftyOhmHtmlRenderer(HtmlRenderer):
         return None
 
     def render_quote(self, token):
-        return f"„{self.render_inner(token)}“"
\ No newline at end of file
+        return f"„{self.render_inner(token)}“"
+
+    def render_underline(self, token):
+        return f"<u>{self.render_inner(token)}</u>"
\ No newline at end of file
diff --git a/renderer/underline.py b/renderer/underline.py
new file mode 100644
index 0000000..36d6b8e
--- /dev/null
+++ b/renderer/underline.py
@@ -0,0 +1,11 @@
+import re
+
+from mistletoe.span_token import SpanToken
+
+
+class Underline(SpanToken):
+    """
+    Underline span token (<u>Untersrich</u>).
+    Identifies underlined text.
+    """
+    pattern = re.compile(r'<u>(.+)</u>')
diff --git a/test/test_underline.py b/test/test_underline.py
new file mode 100644
index 0000000..6f63da8
--- /dev/null
+++ b/test/test_underline.py
@@ -0,0 +1,16 @@
+import mistletoe
+
+from renderer.fifty_ohm_html_renderer import FiftyOhmHtmlRenderer
+from test.util import paragraph
+
+
+def test_underline_html() :
+
+    assertions = {
+        "<u>Text</u>" : "<u>Text</u>",
+        "<u> Text Text </u>" : "<u> Text Text </u>",
+        "<u> Text *Text* </u>" : "<u> Text <em>Text</em> </u>",
+    }
+
+    for assertion in assertions:
+        assert mistletoe.markdown(assertion, FiftyOhmHtmlRenderer) == paragraph(assertions[assertion])