diff --git a/ja_law_parser/model.py b/ja_law_parser/model.py
index a40adca..92075e8 100755
--- a/ja_law_parser/model.py
+++ b/ja_law_parser/model.py
@@ -1005,9 +1005,9 @@ class WithArticleRange(BaseXmlModel, arbitrary_types_allowed=True):
 
     @computed_element(tag="ArticleRange")  # type: ignore[arg-type]
     def article_range(self) -> Optional[ArticleRange]:
-        if self.article_range is None:
+        if self.article_range_raw is None:
             return None
-        return ArticleRange(raw_element=self.article_range)
+        return ArticleRange(raw_element=self.article_range_raw)
 
     article_range_raw: Optional[etree._Element] = element(tag="ArticleRange", default=None, exclude=True)
 
diff --git a/tests/test_toc.py b/tests/test_toc.py
new file mode 100644
index 0000000..9a3e1bd
--- /dev/null
+++ b/tests/test_toc.py
@@ -0,0 +1,32 @@
+from ja_law_parser.model import TOC
+
+
+class TestTOC:
+    def test_toc(self):
+        xml = """\
+        <TOC>
+          <TOCLabel>目次</TOCLabel>
+          <TOCChapter Num="1">
+            <ChapterTitle>Chapter 1</ChapterTitle>
+            <ArticleRange>（第一条・第二条）</ArticleRange>
+          </TOCChapter>
+          <TOCChapter Num="2">
+            <ChapterTitle>Chapter 2</ChapterTitle>
+            <ArticleRange>（第三条―第五条）</ArticleRange>
+          </TOCChapter>
+          <TOCSupplProvision>
+            <SupplProvisionLabel>附則</SupplProvisionLabel>
+          </TOCSupplProvision>
+        </TOC>
+        """
+        toc: TOC = TOC.from_xml(xml)
+        assert toc is not None
+        assert toc.toc_label == "目次"
+        assert len(toc.toc_chapters) == 2
+        assert toc.toc_chapters[0].num == "1"
+        assert toc.toc_chapters[0].chapter_title.text == "Chapter 1"
+        assert toc.toc_chapters[0].article_range.text == "（第一条・第二条）"
+        assert toc.toc_chapters[1].num == "2"
+        assert toc.toc_chapters[1].chapter_title.text == "Chapter 2"
+        assert toc.toc_chapters[1].article_range.text == "（第三条―第五条）"
+        assert toc.toc_suppl_provision.suppl_provision_label.text == "附則"