The goal of this study was to analyze the role of irrational beliefs and other mediating variables in emotional adjustment after marital separation. Self-esteem and attachment to the ex-spouse were chosen as indicators of emotional adjustment. For this purpose several mediation centres and associations for separated people took part in the project. The results showed that irrational beliefs, as well as length of conflict during marriage, time since divorce and desire of contact with the former spouse, are good predictors of emotional adjustment. It has been suggested that Rational-Emotive-Behavior Therapy can be used in the treatment of divorced people.