The former prime minister and leader of the centre-right Forza Italia party, joined the site on Tuesday and has already become an active member of the social network.
Over 60 photos have already been published on the media mogul's account, which takes the name SilvioBerlusconi2015.
They include photos of the politician in Puglia as part of Forza Italia's regional election campaign as well as more intimate snaps of the politician with his girlfriend Francesca Pasquale and their beloved pooch Dudù.
By Thursday the account had attracted over 12,000 followers and hundreds of comments, mostly positive.
Long plagued by legal woes, the 78-year-old was in March acquitted by Italy's top court for paying for underage sex with a starlet nicknamed "Ruby the Heart Stealer".
Berlusconi at work at his Rome residence in Palazzo Grazioli with dog Dudù.
Berlusconi at home with girlfriend Francesca Pasquale.
Berlusconi in Palazzo Grazioli.
With mayoral candidate for Lecco, Alberto Negrini.
Berlusconi in Puglia with Adriana Poli Bertone, candidate in the regional elections.