The present study was conducted to investigate the factors affecting the adoption of recommended agricultural practices and to determine the present level of adoption practices to cultivate the cashew farmers in Mannar District of Sri Lanka. In this study, a total 100 farmers were randomly selected from three Divisional Secretariats in Mannar District and details on adoption of recommended agricultural practices were collected from the farmers through structured questionnaire and interview. Result revealed that the communication channel significantly (p<0.1) and positively influences the adoption level of pest and disease management practices, and fertilizer application. Attributes of innovation significantly (p< 0.1) and positively influences the pest and disease management practices and pruning practices. Social system significantly (p<0.1) and positively influences the pre planting practices, pruning practices, fertilizer application and new varieties. Present level of adoption practices showed that, Fifty five percent of the respondents adopted for pre planting practices and 51% of farmers partially adopted for planting the recommended new varieties. More than half of the respondents were not adopted for recommended practices related to pruning practices (80%), pest and disease management (67%), and fertilizer application (51%).