Treviso, yet to record a win this season, were in with a chance of breaking that duck as they held an 18-16 half-time lead through Luca Morisi and Benjamin Vermaak's tries, with Tom Isaacs crossing for the Welsh outfit.
But Ospreys captain Justin Tipuric continued his recent form with the only try of the second half while Dan Biggar kicked 19 points in all to help their side to a third successive win.
Treviso had launched a late comeback bid as replacement Willem de Waal kicked three penalties but Kristian Phillips knocked one over of his own a minute from time to wrap up the victory.
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The entire All Blacks apparel line has been updated for 2013/14. Check out the New Zealand All Blacks polo.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Gilbert Blitz 8S rugby cleat is a great cleat at a great price of $69.99. Get a new pair of cleats today.
A cool looking all black rugby cleat with the high performance adidas is known for. Get in the Gear!
Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
The All Blacks Performance t-shirt is black with hints of blue from the training jersey. Very Cool.
The New Zealand All Blacks training jersey for 2013/14. Get in the Gear!
The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.