Background: Sleep disorders and allergies in children are increasingly relevant health issues that require attention. Sleep is a vital component of human life that serves many critical roles in mental health and physical well-being. This study aimed to assess sleep disorders among children with allergic diseases. Research design : Across- sectional research design was carried out in this study. Setting: The present study was conducted at allergy and immunology unit outpatient clinics at Zagazig University Hospital and four schools at Abu Kabir Center, Sharqia Governorate, Egypt. Subjects: A matching sample of 87 parents of children with allergic diseases and 87 parents of normal children aged 6-15 years .Tool: Two tools were used for collecting the necessary data. The first tool was a structured interview questionnaire. The second tool was Sleep Disturbance Scale for Children (SDSC). Results: The total mean score of sleep disorders in children with allergic diseases was 41.16±11.54 compared to 30.82±7.94 in the control group. Conclusion: Children with allergic diseases were more vulnerable to sleep disorder than non-allergic children. Not only children with allergic diseases have sleep disorders but although non allergic children have sleep disorders. There was a highly statistically significant relation between types of allergic diseases and sleep disorders .Recommendation: Promoting early screening and diagnosis of these issues to provide timely support and intervention program for children with allergic diseases as well as non-allergic children .Encouraging collaboration between allergists, pediatricians, psychologists, and sleep specialists to provide comprehensive care plan.