The batsman retired hurt last Friday in the final few overs of Australia's thumping 10-wicket victory in the first test after being struck on the helmet by a Shamar Joseph delivery.
"Usman Khawaja has been cleared to play the second test match against the West Indies in Brisbane," the team said in a statement on Monday.
"Khawaja was assessed again today and has no symptoms of delayed concussion. He will train at the Gabba tomorrow."
Australia faced the prospect of searching for a new opener for the second time in the series if Khawaja had been unfit to play in the day-night test, which begins at the Gabba on Thursday.
Steve Smith moved up the order to replace David Warner when the veteran opener retired from the format in the wake of the 3-0 series sweep of Pakistan around the New Year.
