Having revealed a new visa regime in September, officials confirmed the latest changes earlier.
Under the new rules, women will also be allowed to stay in hotel rooms alone.
Couples previously had to prove they were married before getting a hotel room - but now these rules have been relaxed for foreigners
All Saudi nationals are asked to show family ID or proof of relationship on checking into hotels.
This is not required of foreign tourists.
All women, including Saudis, can book and stay in hotels alone, providing ID on check-in.
The new visa regulations state that female tourists are not required to fully cover up but are still expected to dress modestly.
Alcohol remains banned.