Systemic lupus erythematosus (SLE) is a chronic multisystem disease that affects among others the sleep of the patients. Sleep affects the quality of life of these patients and is affected by the disease. The aim of the study is the evaluation of the sleep in children with SLE , and it's effect on their school grades. 38 children diagnosed with SLE attending the hospital over a period of 1 year from May 2017 till April 2018 and 30 matched control subjects. After taking a written concent, complete history and examination were taken and the sleep disturbance scale for children was used to evaluate the sleep of the children and comparing it with their school grades. Both the total score and the 6 subscores were compared between both groups. 52.6% of the patients had sleep problems as follows: 13.2% had disorders of initiating and maintaining sleep which was highly significant compared to the control group. 2.6% had sleep disordered breathing, 10,5% with arousal disorders also significantly different from the control subjects as well as 7.9%with sleep hyperhiderosis statistically significant result. 2,6% with disorders of excessive somnolene also significantly different, 5.3%with sleep wake transition also statistically significant result and 7.9%with total sleep disturbance total score The total sleep disturbance score was highly significant different between both patients and control group (p<0.001) The scolastic achievement was also significantly lower in the SLE group .The sleep parameters significantly related to this result were mainly the sleep disordered breathing subscore and the total score Sleep disorders should be screened in SLE patients.