The workplace is the setting in which many people spend the largest proportion of their time. Many people, particularly in developing countries, the boundary between their home and workplace environments is blurred, since they often undertake agricultural or cottage industry activities within the home. Study was conducted to assess the effectiveness of planned health teaching on knowledge regarding the prevention of occupational hazards among the workers of selected industrial areas of Indore city. Objectives of the study were to assess the effectiveness of planned teaching on knowledge regarding the prevention of industrial hazards among the industrial workers in RICCO Industrial area in Jaipur. & to associate the demographic variables and pre test knowledge regarding prevention of industrial hazards among the industrial workers in selected industries of Indore city. Research approach was evaluatory approach was found to be the most appropriate & research design was pre test post design. Sample Size was 60 & Sample type was Convenience Sampling, Descriptive and inferential statistics were used for analysis. The mean post-test score(18.25) of knowledge of  workers  were higher than mean pretest knowledge(13.58) score   The ‘t’ value computed for knowledge score was (t=9.32) showed  significant difference, ‘t’ value suggesting that planned health teaching was effective in increasing the knowledge of worker’s . There is no significant association between knowledge on prevention of occupational hazards and age in years, number of children type of family and total experience except significant association between knowledge on prevention of occupational hazards with  the educational status and monthly income of the workers.