diff --git a/turtlebot3_autorace_camera/data/ReadMe.md b/turtlebot3_autorace_camera/data/ReadMe.md
new file mode 100644
index 0000000..36fca6a
--- /dev/null
+++ b/turtlebot3_autorace_camera/data/ReadMe.md
@@ -0,0 +1,3 @@
+The file, checkerboard_for_calibration.pdf, is come from following link:
+
+[http://wiki.ros.org/camera_calibration/Tutorials/MonocularCalibration](http://wiki.ros.org/camera_calibration/Tutorials/MonocularCalibration)
\ No newline at end of file
diff --git a/turtlebot3_autorace_camera/data/checkerboard_for_calibration.pdf b/turtlebot3_autorace_camera/data/checkerboard_for_calibration.pdf
new file mode 100644
index 0000000..92382ee
Binary files /dev/null and b/turtlebot3_autorace_camera/data/checkerboard_for_calibration.pdf differ