Eyewitness identifications are important to jurors, especially in criminal trials. Psychological research has shown, however, that eyewitness testimony is systematically fallible in ways that undermine the goals of the rules of evidence. This article assesses the arguments for and against admitting expert testimony concerning cognitive science research about eyewitness identification. The article concludes that experts should in many instances be allowed to testify about the problems with eyewitness identification testimony.