Background. Toxic leadership becomes a real problem in nursing administration. Its toxicity 
harms the nursing staff's progress and creates a challenging work environment full of struggles 
that in turn, produce adverse outcomes on the nursing staff motivation, productivity and 
cooperation which consequently effect on nursing staff's job security. Aim of the study: To 
assess nursing staff's perception of toxic leadership and job security. Subjects and Method.
Research design: A descriptive - correlational design was applied. Subjects: A total number 
of stratified random sample was 310 out of 1618 nurses who were enrolled during data 
collection time. It divided as follows: Main hospital (160), Chest hospital (50), Pediatric 
hospital (50), Medical hospital (50). Tools: Two tools for data collection were used. the first,
Nursing Staff's Perception of Toxic Leadership Questionnaire and the second Nursing Staff' 
Job Security Scale. Results: nearly two thirds (60.0%) of nursing staff had a high-level 
perception of overall toxic Leadership. Two thirds (63.2%) of nursing staff had a low 
perception level of overall job security. Conclusion: The present study showed a highly 
statistically significant negative correlation between nursing staff perception of overall toxic 
leadership and overall job security. Recommendations: Establish leadership educational 
programs to provide health care leaders with the skills they need to build an organization of 
collaboration and participative management and managing complex care environments that 
leads to high sensation of job security