The Smoking Hazards Scale (SHS) is a 12-item questionnaire with four scales designed to assess respondent perceptions of obvious health risks due to smoking, subtle health risks due to smoking, health risks not associated with smoking, and risks for stressful life events. The SHS focuses on risk perceptions for objective consequences and can be used to test causal pathways in behavioral treatment programs for smoking cessation. Reliability and validity information are presented from a sample of 215 smokers in the precontemplative and contemplative stages of change. While these smokers see themselves at an increased risk for the obvious health risks due to smoking, they are unaware of the subtle risks of smoking.