Study aim: The effect of implementing mindfulness exercises on moral distress among nurses working in the intensive care units of Imam Reza educational and medical center in Larestan in 2025 Design: A clinical trial with two groups (intervention and control) will be conducted on 56 participants who are selected using convenience sampling. Using a random number table, the participants will be randomly assigned to either the intervention group or the control group. Settings and conduct: The study will be conducted in the intensive care units of Imam Reza Educational and Medical Center in Larestan. The study population consists of 56 nurses. Blinding type: No blinding will be applied in this study. Participants/Inclusion and exclusion criteria: Inclusion criteria:Holding a bachelor's degree or higher; ability to attend all sessions; having at least 6 months of work experience in intensive care units. Exclusion criterion: Simultaneous participation in an intervention program during the implementation of the research Intervention groups: Intervention group: After completing the questionnaires, participants will take part in eight 60-minute mindfulness training sessions based on the Kabat-Zinn model. The sessions include mindful breathing, body scan, meditation, mindful movement, and non-judgmental awareness. Control group:The control group will not receive any intervention. Main outcome variables: Moral distress score