The man, identified only as Chinese, was being treated, the state-run Xinhua news agency said.
The explosion, which occurred in the airport's Terminal 3, caused no other injuries, the report said.
Xinhua said the explosion came at about 6:24 pm (1024 GMT), adding that police were investigating.
Police and the airport's information office could not immediately be reached for comment.
China Central Television's Twitter-like microblog said no flights were affected by the incident and that the situation had returned to normal.
Photos carried on Xinhua's website showed what appeared to be medical and other workers attending to someone on the floor and people running through the terminal amid white-coloured smoke.
The captions said the explosion occurred near the terminal's Exit B.
source: www.abs-cbnnews.com
