The military said in a statement on Wednesday that the missile was an improved version of the Shaheen 1 with a longer range. The Shaheen 1 is believed to have a range of 750 kilometers (465 miles).
The military did not provide the exact range of the new Shaheen 1A.
The launch comes days after Pakistan's neighbour India, announced that it had successfully test-launched a new nuclear-capable, long-range missile. The Agni-V has a range of 5,000 kilometers (3,100 miles).
Pakistan and India have fought three major wars since they both achieved independence from the British Empire in 1947.