diff --git a/bot/reviewbot/tools/rustfmt.py b/bot/reviewbot/tools/rustfmt.py
new file mode 100644
index 0000000000000000000000000000000000000000..06febd4c5d73478b4c2c41803db138a8fef30eec
--- /dev/null
+++ b/bot/reviewbot/tools/rustfmt.py
@@ -0,0 +1,63 @@
+"""Review Bot tool to run rust fmt."""
+
+from __future__ import unicode_literals
+
+import logging
+
+from reviewbot.tools import Tool
+from reviewbot.utils.process import execute, is_exe_in_path
+
+
+logger = logging.getLogger(__name__)
+
+
+class RustfmtTool(Tool):
+    """Review Bot tool to run rust fmt."""
+
+    name = 'rust fmt'
+    version = '1.0'
+    description = ('Checks that Rust code style matches rustfmt.')
+    timeout = 30
+
+    def check_dependencies(self):
+        """Verify the tool's dependencies are installed.
+
+        Returns:
+            bool:
+            True if all dependencies for the tool are satisfied. If this
+            returns False, the worker will not listen for this Tool's queue,
+            and a warning will be logged.
+        """
+        return is_exe_in_path('rustfmt')
+
+    def handle_file(self, f, settings):
+        """Perform a review of a single file.
+
+        Args:
+            f (reviewbot.processing.review.File):
+                The file to process.
+
+            settings (dict):
+                Tool-specific settings.
+        """
+        if not f.dest_file.lower().endswith('.rs'):
+            # Ignore the file.
+            return
+
+        path = f.get_patched_file_path()
+
+        if not path:
+            return
+
+        # Build and execute the rust fmt command.
+        try:
+            rustfmt_output = execute(['rustfmt', '--check', path],
+                                     ignore_errors=True)
+
+            if rustfmt_output:
+                f.comment('This file contains formatting errors and should be '
+                          'run through `rustfmt`.',
+                          first_line=None,
+                          rich_text=True)
+        except Exception as e:
+            logger.exception('rustfmt failed for the file: %s %s', path, e)
diff --git a/bot/setup.py b/bot/setup.py
index 07764e4a52a729b4386dadc2efccd6d21d8ff9b4..7dcf6a1eabd9a6911bac789fd3d7dbcca636906e 100755
--- a/bot/setup.py
+++ b/bot/setup.py
@@ -37,6 +37,7 @@ setup(
             'pycodestyle = reviewbot.tools.pycodestyle:PycodestyleTool',
             'pydocstyle = reviewbot.tools.pydocstyle:PydocstyleTool',
             'pyflakes = reviewbot.tools.pyflakes:PyflakesTool',
+            'rustfmt = reviewbot.tools.rustfmt:RustfmtTool',
         ],
     },
     install_requires=[