: A brief questionnaire has been developed to measure behaviour related to dietary fat intake. It is self‐administered and self‐coded. Mean completion time is about three minutes. Criterion validity was assessed by comparison with a well‐established food frequency questionnaire using 124 adults from Newcastle and Sydney. The correlations with the questionnaire scores were: r = 0.55 for total fat as a percentage of total energy, r = 0.67 for saturated fat as a percentage of total energy, and r = 0.44 for polyunsaturated to saturated fat ratio. Reproducibility was assessed by re‐use by 25 subjects after seven to nine months (r = 0.85). When used in a community survey of over 300 randomly chosen people in the Hunter Region, the mean scores for men and for women and among different age groups were significantly different. The questionnaire was strongly associated with other scales measuring attitudes, behaviour and knowledge related to low‐fat diets. The questionnaire appears suitable for rapid self‐assessment by subjects, and as it directs their attention to aspects of their diet which might need improvement, it could be used for health education. It might also be used for epidemiological studies to rank subjects broadly according to their fat‐intake behaviour.