Four hundred and twenty-five nurses working in a 420 bed metropolitan psychiatric hospital were asked to complete a questionnaire about their experience of physical assault by patients and their attitude toward the problem. 61% returned the questionnaire. The overall mean annual rate of assault per nurse was 2.0, with student psychiatric nurses (mean 6.7) significantly more at risk than any other group. Nurses working in the psychogeriatric area reported more than double the rate of assaults reported by nurses working in rehabilitation services. 60% of respondents were female; there were very few sex differences in attitudes to assault. Overall, nurses reported a high tolerance for assault, although they recognised it as an experience that was often very traumatic psychologically. Views about managing assaultiveness differed widely, and this lack of consensus probably hinders the development of optimal strategies to deal with what is a major problem in many psychiatric units.