Background:Afebrileseizureisaneurologicdisorderthatmostoftenencountered childrenandaffectsabout4% ofchildren.Boysmoreoftensufferfrom febrile seizures to the incidentthan girls.Approximately 30% to 40% ofchildren experiencedonerelapse.Febrileseizuresoccur10%ofchildrenbetweentheagesof 9months-5yearswithanaverageonsetof14-18months,withtheincidencerate ofabout3-4%.Febrile seizures can have serious consequences such as neurologicaldeficit,epilepsy,mentalretardation,orachangeperilaku. Objective:theobjectivethisstudyistodescribethelevelknowledgepediatricnurse offebrileseizures. Methods:This study used a descriptive quantitative non-experimental.The samplingtechniqueusingtotalsampling.ThisresearchwasconductedinJuly- Augustwithrespondents38pediatricnurses. Results:Theresultsshowedthatthemajorityofrespondentsaged31-40yearswith 17respondents(44.7%),femalegenderasmuchas38respondents(100%),lenght ofworkis5-10yearsasmanyas15respondents(28.9%)andthemajority respondeneducationlevelisD3asmanyas31respondents(81.6%). Conclusion:ThelevelknowledgepediatricnurseoffebrileseizuresinRS PKU Muhammadiyah Yogyakarta, PKU Muhammadiyah Gamping and RS PKU MuhammadiyahBantulmajorityinbothcategories