Ex-Catania striker Mascara excited by Napoli chance
He has put pen to paper on a contract until June 30, 2013.
Speaking to Radio Kiss Kiss, Mascara said: "The deal wasn't simple.
"For me it's an honour to be part of this squad and I am prepared to realise important objectives.
"My wife is from Campania. I come here with great enthusiasm and also a little experience in football, which counts."