Ulster's Ravenhill ground will be renamed the Kingspan Stadium from next season following a sponsorship deal with a building materials firm.
Kingspan have been a sponsor of Ulster since 1999 and they have agreed a 10-year deal with the club.
Ulster chief executive Shane Logan said: “We're delighted to have extended our partnership with Kingspan, one of Ulster's most successful international companies, and to have secured a stadium naming rights partner for the first time.
"This is a landmark deal and one that will have considerable benefits for all of rugby in Ulster.
"I want to thank Kingspan for its long-term commitment to the Province and I look forward to many more special rugby occasions, from school and club finals to European match nights, at Kingspan Stadium in the future."
Meanwhile, debutant Robbie Diack is among seven Ulster starters in the Ireland team to play Argentina in Resistancia on Saturday. The game will be shown live on Sky Sports and kicks-off at 7.40pm (GMT).