This year the event's partner-country is Great Britain, said its organiser Sandra Marusic.
The investment fair was opened by Construction and Physical Planning Minister Predrag Stromar and Tourism Minister Gari Cappelli.
Stromar said that the government wanted to create a positive investment climate and that one of its main goals was to prevent further emigration.
He noted that Croatia was becoming more and more attractive to investors, notably those interested in investing in the tourism sector.
This was confirmed by Minister Cappelli, who said that this year around EUR 850 million had been invested in the tourism sector, which had helped open 40 hotels and employ 2,000 people.
Cappelli noted that next year investments in the tourism sector could increase to more than one billion euros.
He said that he expected the number of tourists in Croatia next year to be higher than this year.
"I know that the problem of VAT in tourism is not insignificant but I am confident that tourism will benefit from tax measures. Talks should be held with the finance minister to make sure that the VAT rate on food and drinks in restaurants is reduced in line with the sector's requests," Cappelli said.
He said that a higher than planned quota of work permits for foreign nationals in the tourism sector would be approved.
Montenegrin Parliament Speaker Branimir Gvozdanovic addressed the event, presenting data on investment projects in the tourism and construction sector in his country worth billions of euros.
British Ambassador to Croatia Andrew Dalgleish expressed satisfaction that his country was the partner of this year's REXPO.
The event, to include a number of panel discussions and business talks, will discuss the Peljesac bridge project, investments in tourism, notably luxury tourism, foreign investments in the region, with emphasis on public-private partnership, high-end projects, EU funds and government grants, etc.