Abstract: This research aims to analyze characteristics of semiorganic and conventional vegetable farmers, types of crops and cropping patterns, the cost structure of farming, and risk productivity semiorganic and conventional vegetable. The research location is determined by purposively, in four villages in Semarang Regency. The number of samples 132 farmers, consisting of 30 semiorganic vegetable farmers and 92 conventional vegetable farmers randomly selected. Data were collected by survey method through interviewing by using structured questionnaires and observation. The data were analyzed descriptively and risk analysis with used calculation of standard deviation and coefficient variation. The results show characteristics semiorganic vegetable farmers such as age, education, number of family members in farming, farming experience are higher than conventional vegetable farmers, except farm size. The types of crops semiorganic and conventional vegetables farmers are the same, but the semiorganic vegetable farmers more choose cabbage, tomatoes and chinese cabbage. Conventional vegetable farmers choose cabbage, chili, tomatoes and tobacco. The highest cost structure for semiorganic and conventional vegetable farming is for labor costs. The highest cost of vegetable production was in labor costs. Total production cost of semiorganic vegetables was 31 percents higher than conventional ones. The risk analysis of productivity used by deviation standard showed that the risk productivity of semiorganic vegetables 59 percents higher than the conventional one. The risk analysis of productivity used by the coefficient of variation showed that the risk productivity of organic vegetable 13 percents lower than the conventional ones.