Background: Intensive Care (IC) nursing supervisors‟ ability to manage paradoxical issues and organizational learning capabilities can influence nurses‟ voice behavior (VB) that affects the hospital overall quality. Study aim: To compare between Tanta University and EL-Mehala General Hospitals regarding the influence of supervisors‟ paradoxical leadership and organizational learning capability on nurses‟ voice behavior. Method: Comparative cross-sectional design was used. Setting: The study was conducted in IC units at both Tanta University and ELMehala Hospitals Subjects: Included convenience sample of 205 IC nurses from both hospitals. Tools: 3 tools were used, Nursing Supervisors‟ Paradoxical Leadership, Organizational Learning Capability (OLC), and Nurses‟ Voice Behavior Questionnaires. Results: At Tanta University Hospital 54% of IC nurses had moderate level of perception regarding supervisors‟ paradoxical leadership, 51% had low level of OLC and 30% had moderate level of VB. At ElMehala Hospital 82.9% of IC nurses had a low level of perception regarding supervisors‟ paradoxical leadership, 81.0% had low level regarding OLC, and 49.5% had low level of VB. Conclusion: There was statistical significant difference between the two hospitals regarding nurses‟ perception of supervisors‟ paradoxical leadership and OLC and their VB. Recommendations: Train nursing supervisors about paradoxical leadership and its importance to develop nurses professionally, and value nurses‟ voice behaviors.