PURPOSE: The study was done to identify factors influencing health promoting behaviour in office workers according to the type A/B personality. METHODS: The data were collected by questionnaires from 249 workers in Seoul and Gyung-gi province. Measures were a health promoting behaviour, the type of personality, self-esteem, perceived health status, social support, and job stress. The data were analyzed using Pearson correlation coefficients, t-test, and stepwise multiple regression with SPSS/WIN 15.0 version. RESULTS: This study suggests that A type office workers have a little lower degree in health promoting behaviour, self-esteem, social support and have a higher degree in perceived health status, perceived symptoms and job stress than those of B type office workers. The factors which influence A type office workers on health promoting behaviour are social support, perceived health status and self-esteem, which accounted for 40.2% of the variance and those of B type office workers, self-esteem and perceived health status accounted for 24.5%. CONCLUSION: It needs to develop and operate self-management program for health maintenance and promotion for the type A/B personality White Collar Workers.