"The arrival of newer aircraft will further enhance the overall punctuality of our fleet and bring about greater fuel efficiency and lower maintenance costs," acting head of engineering at SriLankan D A G Jayasuriya, said in a statement.
The aircraft had arrived on March 23. It is currently being repainted with the SriLankan Airlines livery and undergoing a maintenance check at SriLankan Engineering's hangar complex at Colombo's Bandaranaike International Airport.
Sri Lankan operates a fleet of four A320s, four wide-body A330s and five wide-body A340s.
The A320s are used to fly to India, Pakistan, the Maldives, and some cities in the Middle East.
The SriLankan fleet now operates 13 aircraft – four A320s, four twin-engined widebody A330s, and five four-engined long-haul A340s.