Psychological attributes are the internal human characteristics which reflect a great impact over the trainees of any programmme. These attributes are distinct for each and everyone. National Institute of Agricultural Extension Management (MANAGE) had launched a individual financed One-year Diploma in Agricultural Extension Services for Input Dealers (DAESI) Programme during the year 2003 for the input dealers in order to make input dealer competent enough in terms of knowledge and skill. In Chhattisgarh, under the flagship of Indira Gandhi Krishi Vishwavidhayalaya Raipur, Directorate of Extension Services had initiated a yearly Diploma course which was started in the year 2017-18. This study is focused to access the role of Psychological Attributes of DAESI dealers in knowledge and skill development. a random sample of 100 participants were selected out of 154 participants. The data was collected through a well prepared Questionnaire & need based online data methods and ex-post facto research design was used. The study reveals that majority of respondents were moderately benefited from DAESI programme 2019-20 in terms of increase in knowledge and gain in skills. Correlation and path analysis between various psychological attributes and increase in knowledge & gain in skill reveals that three attributes namely, innovativeness, risk bearing ability and self-confidence is considered the most important and determining attribute for increase in knowledge and skill level of DAESI dealers