Background: The suction technique is a fundamental procedure in any intensive care unit (ICU). Use of the suction technique can be vital in an emergency, but there are many barriers that hidden suction technique to be successful. Aim: was to assess the barriers facing nurses' implementation of suction techniques at Intensive Care Units. Subjects and Method: Design: A descriptive study design was utilized. Setting: This study was conducted at the Surgical and Anesthesia Intensive Care Unit at International Educational Hospital, Emergency Hospital, Internal Hospital and Neurological Intensive Care Unit of Internal Hospital affiliated to Tanta University. Tools of the study: Two tools were used in this study. The tool I: Nurses' Structured Questionnaire, Tool II: Nurses' questionnaire related to barriers of suction techniques. Results: About two third (68.1%) of the total nurses had high barriers to suction techniques, there was a statistically significant relationship between the nurses, sociodemographic characteristic and nurses, level of education in which p=0.001. Conclusion: Two-third of the total nurses were had high barriers related to suction techniques and the majority of the nurses have had a negative attitude toward suction techniques. Recommendation: Periodic in-service training program should be provided to nursing staff in order to keep them updated on recommended guidelines regarding suction techniques.