Background: Clinical judgment has been recognized as a vital component of skilled nursing practice and helps nurses with optimal results to provide safe patient care. Nurses can need assistance to develop their clinical judgment skills, particularly those transitioning into clinical practice. Aim: To investigate the effects of using clinical judgment rubric on students' performance and communication skills. Methodology: A quasi Experimental research designwas conducted during the second semester of the academic year 2018-2019 at faculty of nursing affiliated to Mansoura University at Egypt on 50 pediatric students through using pre designed questionnaire, Likert scale to assess communication skills, checklist tool and Lasater clinical judgment rubric scoring sheet. Results: last GPA, 26% of students had B⁺, related total communication skills; mean score at pre was 14.11 ± 3.88, while at post was 29.15 ± 4.92. Also, related total performance, detected that means score at pre was 10.27 ± 3.11, while at post was 14.99 ± 2.89. Conclusion: Clinical judgment rubric had highly significant a positive effect on students' performance and communication skills. While, had slight improvement at students' performance.