AbstractA survey was undertaken of needle‐sharing and sexually risky behaviour among 231 Australian amphetamine users, half of whom usually injected amphetamine. The prevalence of risky needle use and sexual behaviour was similar to that observed in recent Australian surveys of opioid injectors. About a third of those who had ever injected had shared needles, and the variables that best predicted frequency of sharing needles were having an injecting drug user as a partner, having experienced symptoms of dependence on amphetamines, and having sought medical treatment for an amphetamine related problem. Regular condom use with either regular or casual partners toas low; only the minority employed in the sex industry regularly used condoms. Sexual risk‐taking was not related to needle‐sharing or amphetamine use. Although Australian amphetamine and opioid users have reduced their risks of transmitting HIV, there remains a substantial minority of both types of drug injector who continue to place themselves and others at risk by sharing needles and engaging in unsafe sexual beha