Abstract: Recklessness involves unreasonable/unjustified risk-taking. The argument here is that recklessness in the criminal law is best understood as nevertheless containing an element of reasonableness. To be reckless, on this view, the defendant must reasonably believe that she is exposing others to a risk of harm. If the defendant’s belief about the risk being imposed by her conduct is unreasonable, she should not (normally) be considered reckless. This point is most important in relation to offences of endangerment where recklessness sets the outer limits of criminal liability.