"We as a chamber of commerce believe in presenting a resilient front in the face of adversity," it said.
"The country must come together in difficult times such as these and show our strength as a nation."
The statement was issued in the wake of two Tamil Tiger bomb attacks in the capital Colombo within a week of each other last month and escalating fighting in the north and east.
The chamber statement also comes at a time of mounting concern about abductions and human rights violations which prompted Britain and Germany to freeze aid to the government and pressure it to resume peace talks with the Tigers.
"The Chamber continues to endorse a bipartisan approach to solving the North-East conflict: a solution that will meet the aspirations of the great majority of the Sinhala, Tamil, Muslim and other ethnic groups of Sri Lanka," the statement said.
The government is trying