diff --git a/jxls-poi/src/test/java/org/jxls/TestWorkbook.java b/jxls-poi/src/test/java/org/jxls/TestWorkbook.java
index a526f5d9..0bafc6bc 100644
--- a/jxls-poi/src/test/java/org/jxls/TestWorkbook.java
+++ b/jxls-poi/src/test/java/org/jxls/TestWorkbook.java
@@ -180,4 +180,11 @@ public void close() {
             }
         }
     }
+
+    /**
+     * @return all merged cell regions of current sheet
+     */
+    public List<CellRangeAddress> getMergedRegions() {
+        return sheet.getMergedRegions();
+    }
 }
diff --git a/jxls-poi/src/test/java/org/jxls3/Issue259Test.java b/jxls-poi/src/test/java/org/jxls3/Issue259Test.java
new file mode 100644
index 00000000..27fd57ae
--- /dev/null
+++ b/jxls-poi/src/test/java/org/jxls3/Issue259Test.java
@@ -0,0 +1,33 @@
+package org.jxls3;
+
+import static org.junit.Assert.assertTrue;
+
+import java.util.HashMap;
+import java.util.List;
+
+import org.apache.poi.ss.util.CellRangeAddress;
+import org.junit.Test;
+import org.jxls.Jxls3Tester;
+import org.jxls.TestWorkbook;
+import org.jxls.transform.poi.JxlsPoiTemplateFillerBuilder;
+
+/**
+ * Merged cell region outside jx:area is missing
+ */
+public class Issue259Test {
+
+    @Test
+    public void test() {
+        // Test
+        Jxls3Tester tester = Jxls3Tester.xlsx(getClass());
+        tester.test(new HashMap<>(), JxlsPoiTemplateFillerBuilder.newInstance());
+
+        // Verify
+        try (TestWorkbook w = tester.getWorkbook()) {
+            w.selectSheet(0);
+            List<CellRangeAddress> mergedRegions = w.getMergedRegions();
+            assertTrue("Missing merged region B5:C5", mergedRegions.stream().anyMatch(i -> "B5:C5".equals(i.formatAsString())));
+            assertTrue("Missing merged region A1:C3", mergedRegions.stream().anyMatch(i -> "A1:C3".equals(i.formatAsString())));
+        }
+    }
+}
diff --git a/jxls-poi/src/test/resources/org/jxls3/Issue259Test.xlsx b/jxls-poi/src/test/resources/org/jxls3/Issue259Test.xlsx
new file mode 100644
index 00000000..11c38496
Binary files /dev/null and b/jxls-poi/src/test/resources/org/jxls3/Issue259Test.xlsx differ