After the eruption of Merapi, red chili farmers in Wukirsari Village trying to restore the production to make it back become maximum, that is by combining various of production factor. Although the eruption makes the soil texture change, actually does not give effect to farmers in use of production factor, thus making the production becomes not optimal. The objective of this research is to analyze the factors that influence the production of red chili and to analyze the level of technical efficiency, allocative and economic efficiency of red chili farming in Merapi eruption area,Wukirsari Village, Cangkringan District, Sleman Regency. A total of 80 farmers were selected as a sample by using simple random sampling method. Data were analyzed using the Cobb-Douglas Stochastic Frontier production model, and the allocative and economic efficiencies were analyzed by an input-side approach. The results showed that only the area of land and manure had significant effect on the production of red chili. The average of farmers has reached technical efficiency level with index 0,826, in addition, the average of farmers has also reached the allocative efficiency level with index 0,804. However, the average of farmers has not reached in economic efficiency because the efficiency level is only reached index 0,665. Meanwhile, the four internal factors of farmers, that is age of farmers, education level, farm experience and land tenure status had insignificant influence on technical inefficiency.