Agricultural extension agent as a couching counselor in Lebak has an important and strategic position to support agriculture, fishery and forestry. To support his role, an agricultural extension agent should have competency to nurture farmers. This study describes the responsibility and function of agricultural trainer and the farmer characteristic in Lebak district. Data analyzed using SPSS and Lisrel. The result of the study shows that the responsibility and function of agriculture trainer can help the head of the village and the official to escort and assist farmers and business person in the agricultural area. Meanwhile, the characteristic of the farmer as respondents is in the age range 25-65 with the status of the farmers are a land tenant (55%), land owner (41%). Respondents ‘educational background is primary school (54%). Based on data analysis substructure 1 using Lisrel Student 8.54, it can be interpreted that the determinant coefficient reached 0, 51 or 51%. This showed the variability of the variable of agricultural trainer from a farmer perspective is 51%. The existence of agricultural trainer di Lebak in doing the responsibility and function supports the agriculture counselor. From the competency in doing the role, the agricultural trainer has done the job very well, in the case for a few of them are still low. A few of those who are still less efficient in doing responsibility need to improve by giving the government‘s attention.