In addition, 2,000 tickets have been reserved for each of the finalists, and will be available for purchase after the Play Offs, so there are now just 5,000 tickets available for public sale.
Commenting on the excellent level of sales to date John Feehan, CEO of PRO12 Rugby said, "We are delighted that the rugby public has committed to the Belfast Final so quickly. Our last 5 Finals have been sell outs and we are confident that, working with Team Belfast, the 2015 Guinness PRO12 Final in Belfast will be another sell out showcase event and a great weekend for rugby enthusiasts."
Tickets from £22 are available from Ticketmaster.
All ticket categories are currently available, with only a small number of Premium tickets remaining.
