Introduction: Renal nurses should have counselling and communica tion skills with patients, to deal with stressful situations at work. A prerequisite for th e acquisition of these skills is renal nurses’ self -knowledge. This study aims to present the effectiveness of an ongoing training program to renal nurses related to self- esteem. Methodology: A quasi experimental research, which has a theoret ical background from the Rational- Emotive Behaviour Therapy of A. Ellis and from the transformative learning of J. Mezirow. The program attended 31 renal nurses working in district hospit als. Result s: During evaluation of the training activity it wa s quite successful at the cognitive effect that occurred to the participants. In emotional and in b ehavioural level, almost 80% of participants improv ed their attitude towards the absurd ideas that formed their self-esteem by 90%. Conclusion: All who attended the program improved their attitu de regarding their absurd ideas-beliefs, something that reduced person’s self-esteem, making further negative consequences for their psychosoma tic health.