Due to a lack of study focusing on individual level occupational change, the objectives of this study are to investigate the pattern of occupational change among the working age population in the Kanchanaburi study area, Thailand and to describe possible factors influencing the occupational change situation, such as individual factors, and development policy. The sample consisted of 10,604 workers whose ages were between 15-59 years. The study utilized panel data of Kanchanaburi Demographic Surveillance Survey (KDSS). Data are on individuals and collected from the same person in 2000 and 2004 KDSS (1st and 5th round, respectively). Binomial logistic regression analysis was undertaken in the study. Main results from the analysis of occupational change of population in Kanchanaburi DSS indicate male workers have a higher chance of occupational change than female workers. The higher age group of workers shows a lower proportion of occupational change. Non-agricultural workers have a lower chance of occupational change than agricultural workers. Participation in OTOP project or Village fund is also found to relate to occupational change. Moreover, workers in an urban/ semi-urban stratum show a higher chance of occupational change than workers in other strata, obviously.