The current study aims to investigate 1) the collaborative condition between public sectors and community organisations to inhibit the insurgency in the unrest areas of the southernmost provinces and 2) the causal factors which are influential on collaboration between public sectors and community organisations to decrease the violence in southernmost provinces. The sampling groups comprised of community organisations namely leader, committees, or members who are assigned as the representatives of the organisations in southernmost provinces including urban and rural areas. 200 participants were selected by using simple random sampling. The findings led to the following consequences. 1) The collaborative condition between public sectors and community organisations to suppress the insurgency in southernmost provinces took place by coalition among organisations in accordant with the objectives of the government in an attempt to promote peaceful living. 2) Influence line showed statistical significance at .05, and the measure of agreement was acceptable. The last model was calculated as 2 = 583.73, df = 283, 2/2 = 2.06, CFI = 0.91, RMR = 0.06 and RMSEA = 0.07. Trustworthiness between public sectors and community organisations is most likely to influence the insurgency inhibition in the unrest areas of the southernmost provinces which is equal 0.77 and followed by communication between public sectors and community organisations at 0.40.