Benedict Joseph Adriano Placidi, 19, of Warsash Road, Warsash, was charged with going onto the playing area at a football match under the Football Offences Act 1991.
The invader ran on to the pitch from the Fratton end in the second half during a break in play.
Pompey were fined 10,000 euros when a fan invaded the pitch during their match with AC Milan in 2008.
A Pompey spokesman said: ‘It’s important realise these actions are compromising us at a time when we least need it.
‘It is entirely irresponsible.’