Job performance and factors influencing job performance of Agricultural Assistants of Training and Visit System in Karnataka were studied with the help of a structured schedule during May-June, 1991. Some measurement techniques and scoring procedures were developed and some valid scales developed by earlier researchers were also used. A total number of 206 randomly selected Agricultural Assistants of Dharwad district constituted the sample. Results indicated that majority of the Agricultural Assistants had medium level of job performance. Job attitude, mass media exposure, job perception, job satisfaction and facilities and resources available significantly explained the variation in job performance. Job atitude, job satisfaction, mass media exposure, organisational climate had maximum positive effect on job performance in that order.