Despite the long-standing border conflict between the two countries, the Phnom Penh government insists Thai investors are welcome in Cambodia.
Thai investors, too, are confident the tense border conflict will not affect their investment plans.
Cambodian Minister of Tourism Thong Khon said Thai investors are eligible for tax privileges and Thai products imported by them are exempted from taxation for a period of three to eight years.
Mr Thong Khon was full of praise for such Thai businessman as Supachai Verapuchong, managing director of the Sofitel Phnom Penh Pookeerhra Hotel, for his continued investment in Cambodia even though the hotel, formerly known as the Royal Phnom Penh, was severely damaged in an anti-Thai rioting in Phnom Penh in December 2006.
Prime Minister Hun Sen's policy is to encourage more foreign investment in Siem Reap, Phnom Penh and Koh Kong.
Countries in this region which have invested in Cambodia are China, South Korea, Japan, Singapore, Malaysia, Vietnam and Thailand. Those from elsewhere include Australia, Portugal, England, the United States and France.
Mr Supachai, who invested more than two billion baht in the five-star Sofitel Phnom Penh Pookeethra Hotel, said even though the relations between Thailand and Cambodia are plagued with uncertainty he has confidence in the Cambodian government's policy toward investors, including those from Thailand.
In 2006, Mr Supachai invested US$40 million in the Sofitel Ankor Hotel and a golf course in Siem Reap.
"Despite turbulence, Thailand and Cambodia are neighbours. We have to walk together as friends," he said.
"In four years from now, there will not be a tariff wall in Asean. The question is whether Thai investors and the Thai government are eady for the days ahead, when business competition will be tougher.
"So we should establish business ties, which will subsequently lead to improvement of relations in other fields," Mr Supachai said.