diff --git a/smart.run.test.sh b/smart.run.test.sh
index b5c7d75..990928b 100755
--- a/smart.run.test.sh
+++ b/smart.run.test.sh
@@ -18,6 +18,45 @@ smart_device_list="${temp_dir}/smart.device.list"
 # ]]]
 
 # Functions
+## Print help message [[[
+print_help_message() {
+	cat << HELP
+
+usage: $(basename "${0}")   [TEST TYPE]
+
+Try to run a SMART test on all compatible devices.
+
+positional arguments:
+  TEST TYPE               Test type to run on all devices. Can be:
+        short (default) - runs SMART Short Self Test (usually under ten minutes)
+        long            - runs SMART Extended Self Test (tens of minutes to
+                          several hours).
+
+
+EXAMPLE :
+    - Run a short test
+      $(basename "${0}") short
+
+HELP
+}
+## ]]]
+## Check the arguments [[[
+check_arguments() {
+	_nb_arg="${#}"
+	_all_args="${*}"
+
+	[ "${debug}" -eq "0" ] && printf "${c_magentab}%-6b${c_reset}\n" "DEBUG : check_arguments func − ${_nb_arg} argument(s) to manage. List:\n ${_all_args}"
+
+## If help is needed [[[
+	if printf -- '%s' "${_all_args}" | grep -q -E -- "-h|--help|help"; then
+
+		print_help_message
+
+		exit 0
+	fi
+## ]]]
+}
+## ]]]
 ## Test if a disk really support SMART [[[
 ## Smartctl can give an health status even without a full support
 ## of SMART for some type (eg. scsi or megaraid).
@@ -80,6 +119,8 @@ choose_correct_type() {
 }
 ## ]]]
 
+check_arguments "${@}"
+
 # Create files
 true > "${smart_device_list}"