Do apple care can be used in Saudi Arabia??

What device?

For computers there are usually no issues. For iPhones and iPads, service availability may be available only in the country where the device was purchased. Make sure you qualify for REGULAR WARRANTY SUPPORT before spending the money on AppleCare.

As babowa says, you must contact Apple for the final word.

To be sure, it might be best to ask at the Apple store or authorized reseller where you are purchasing your device. I believe you can use it, but we are all just other users, not Apple employees.