This 11 item, interviewer-based scale can be used to assess HIV risk among intravenous drug users. The HIV risk-taking behavior scale (HRBS) includes two subscales to measure injecting and sexual behavior. Six items ask about intravenous drug use behaviors, and five ask about sexual behaviors. The scale was validated on a sample of 175 adults (18-42) from Australia (Alpha = .70). The scale can be used to evaluate risk behaviors over intervals ranging from 1 week to a lifetime.