The main objective of this study was to assess the health behavior, risk awareness and beliefs concerning the importance of positive health practices among blue-collar workers, and to examine the relationships between behavior, knowledge and beliefs. Data were gathered from 1359 workers aged 18-65 years using a postal questionnaire to 2493 randomly selected members of two labor unions. A high prevalence of negative health practices was noted among the respondents. While no relationship was found between health behaviors and awareness of risks associated with such behaviors, there was a relationship between positive health practices and strong beliefs about the importance of those practices. Awareness of the influence of a positive behavior on disease risk was associated with a stronger belief concerning the importance of that behavior. Women were characterized by having more positive health behavior, a higher level of risk awareness and stronger beliefs concerning the importance of positive health practices. It was concluded that while relationships were found between behavior and beliefs, and between beliefs and risk awareness, further research to establish the direction of the relationships is warranted.