diff --git a/src/PhpWord/Element/CheckBox.php b/src/PhpWord/Element/CheckBox.php
index b404a6027e..029bd7d77e 100644
--- a/src/PhpWord/Element/CheckBox.php
+++ b/src/PhpWord/Element/CheckBox.php
@@ -34,6 +34,13 @@ class CheckBox extends Text
      */
     private $name;
 
+    /**
+     * Default state.
+     *
+     * @var bool
+     */
+    private $defaultChecked = false;
+
     /**
      * Create new instance.
      *
@@ -71,4 +78,22 @@ public function getName()
     {
         return $this->name;
     }
+
+    /**
+     * Set default state.
+     */
+    public function setDefaultChecked(bool $default = true): self
+    {
+        $this->defaultChecked = $default;
+
+        return $this;
+    }
+
+    /**
+     * Is default state checked?
+     */
+    public function isDefaultChecked(): bool
+    {
+        return (bool) $this->defaultChecked;
+    }
 }
diff --git a/src/PhpWord/Writer/Word2007/Element/CheckBox.php b/src/PhpWord/Writer/Word2007/Element/CheckBox.php
index 1adf7d6eb1..cd1a93387a 100644
--- a/src/PhpWord/Writer/Word2007/Element/CheckBox.php
+++ b/src/PhpWord/Writer/Word2007/Element/CheckBox.php
@@ -52,7 +52,7 @@ public function write(): void
         $xmlWriter->startElement('w:checkBox');
         $xmlWriter->writeAttribute('w:sizeAuto', '');
         $xmlWriter->startElement('w:default');
-        $xmlWriter->writeAttribute('w:val', 0);
+        $xmlWriter->writeAttribute('w:val', $element->isDefaultChecked() ? 1 : 0);
         $xmlWriter->endElement(); //w:default
         $xmlWriter->endElement(); //w:checkBox
         $xmlWriter->endElement(); // w:ffData
diff --git a/tests/PhpWordTests/Element/CheckBoxTest.php b/tests/PhpWordTests/Element/CheckBoxTest.php
index fbdbf36aa3..204ef99097 100644
--- a/tests/PhpWordTests/Element/CheckBoxTest.php
+++ b/tests/PhpWordTests/Element/CheckBoxTest.php
@@ -85,4 +85,16 @@ public function testParagraph(): void
         $oCheckBox->setParagraphStyle(['alignment' => Jc::CENTER, 'spaceAfter' => 100]);
         self::assertInstanceOf('PhpOffice\\PhpWord\\Style\\Paragraph', $oCheckBox->getParagraphStyle());
     }
+
+    /**
+     * Set and get default value.
+     */
+    public function testDefault(): void
+    {
+        $oCheckBox = new CheckBox('chkBox', 'CheckBox');
+        self::assertFalse($oCheckBox->isDefaultChecked());
+
+        $oCheckBox->setDefaultChecked(true);
+        self::assertTrue($oCheckBox->isDefaultChecked());
+    }
 }
diff --git a/tests/PhpWordTests/Writer/Word2007/Element/CheckBoxTest.php b/tests/PhpWordTests/Writer/Word2007/Element/CheckBoxTest.php
new file mode 100644
index 0000000000..0024908ee3
--- /dev/null
+++ b/tests/PhpWordTests/Writer/Word2007/Element/CheckBoxTest.php
@@ -0,0 +1,53 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpOffice\PhpWordTests\Writer\Word2007\Element;
+
+use PhpOffice\PhpWord\Element\CheckBox as CheckBoxElement;
+use PhpOffice\PhpWord\Shared\XMLWriter;
+use PhpOffice\PhpWord\Writer\Word2007\Element\CheckBox;
+use PHPUnit\Framework\TestCase;
+
+class CheckBoxTest extends TestCase
+{
+    /**
+     * @dataProvider checkBoxCheckedProvider
+     */
+    public function testCheckBoxGeneratesCorrectXml(
+        bool $checked,
+        string $expectedCheckedAttribute
+    ): void {
+        // Arrange
+        $xmlWriter = new XMLWriter();
+
+        $checkBoxElement = new CheckBoxElement('test', 'test');
+        $checkBoxElement->setDefaultChecked($checked);
+
+        $checkBox = new CheckBox($xmlWriter, $checkBoxElement);
+
+        // Act
+        $checkBox->write();
+        $output = $xmlWriter->getData();
+
+        // Assert
+        self::assertStringContainsString($expectedCheckedAttribute, $output, 'Default checked should be applied.');
+    }
+
+    /**
+     * Data provider for testing checked state.
+     */
+    public static function checkBoxCheckedProvider(): array
+    {
+        return [
+            'Default checked' => [
+                'checked' => true,
+                'w:default w:val="1"',
+            ],
+            'Default unchecked' => [
+                'checked' => false,
+                'w:default w:val="0"',
+            ],
+        ];
+    }
+}