For all people, bullying always sparks unpleasant memories, especially at the workplace when employees may be regularly bullied "verbally/ non-verbally" regardless of their age and position. Such a phenomenon consequently affects the employee mood and creates counter organizational citizenship behaviors. This research aims at shedding light on the mediating role of employees' moods between bullying at work and organizational citizenship behavior in Egyptian hotels. A questionnaire was directed to a random sample of 383 workers in front of-house employees in five-star hotels in SharmElshiekh. The obtained data was analyzed statistically by smart PLS version 3. The research revealed a mediating role of employees' moods between bullying at work and organizational citizenship behavior in Egyptian hotels. The research recommends that hotels should accurately monitor the workplace bullying phenomenon among employees to avoid its exacerbating effects.