At the Stadio Bentegodi Pellisier scored his first of the afternoon in the 25th minute after rounding Gianluigi Buffon and slotting in the empty Juve net.
The Old Lady drew level nine minutes later through Italy defender Giorgio Chiellini, who took advantage of a lose ball in the Chievo area to fire his shot in off the bar.
Pellisier restored the hosts' lead after wrapping up a long run with a cool finish one minute from half-time.
In the 53rd minute, Juventus were granted an equalizer after Chievo Colombian defender Mario Yepes miscued his clearance to score against his own team.
Iaquinta thought he won the game for Claudio Ranieri's men when he powerfully headed Mauro Camoranesi's cross home on 79 minutes.
However, Pellisier had other thoughts as the skipper scored his and Chievo's third of the game on 90 minutes.