Aim of work: Evaluation of sleep arousability in nocturnally enuretic children with its measurement in dB and its comparison with that of their continent beers, in a double blind control trial, to prove whether nocturnally enuretic children have a high arousability.Patients and Methods: This study have measured the sound intensity in dB needed to arouse the child during his/her sleep using a sound level meter and a sound source, in a double blind control trial. We have included all children; whether dry or enuretic, males or females, aged 5-12 years. We have excluded any child with organic urinary tract diseases and also those with secondary nocturnal enuresis “have been dry before”. All the included children had precise history, physical exam, U.A. and pelvi-abdominal U/S.Results: We evaluated sleep arousability in a total of 81 children including 53 (65.43%) male and 23 (34.57%) female with mean age 8.63±1.74 years (range 5-12 years). Nine (23.68%) enuretic children showed no response to sounds while arousal was successful in all group B children (p<0.001). The median threshold of arousal was significantly higher in arousable group A; 105 (IQR 98-110) than in group B; 79 (IQR 75-83.5) (p<0.001), “statistically significant”.Conclusion: We believe that a high sleep arousability does contribute to the development of nighttime bed wetting in children.