Objectives <p>A&#xa0;meta-analysis was performed on seven studies in which a treatment program that directly addressed antisocial cognition in offenders was contrasted with a no-treatment or treatment as usual control group.</p> Methods <p>Pre-post administrations of antisocial cognition measures were available for 2 of the 7 studies and revealed medium reductions (Cohen’s <i>d</i>) in pro-criminal attitudes (Criminal Sentiments Scale) and very large reductions in criminal thinking (Psychological Inventory of Criminal Thinking Styles) in participants receiving direct interventions for antisocial cognition. A meta-analysis of recidivism data gathered from all 7 studies then followed.</p> Results <p>Fixed effect and random effects meta-analyses produced pooled effect sizes (odds ratio) of 0.648–0.657. There was no evidence of study heterogeneity or publication bias.</p> Conclusions <p>These results indicate that the odds of recidivism were 34–35% lower in participants who went through an antisocial cognition-based treatment group compared to participants assigned to a control group.</p>