Although influenza is an acute and uncomplicated dis- ease, that limits itself in the healthy children, it may lead todeath by rarely forming the sickness. The most commoncomplication of influenza is pneumonia and it is a rarecomplication which is developed together with myocardi- tis by influenza A and B viruses. A 32 months-old malepatient was admitted for rapidly developed respiratorydistress and tachycardia after fever, cough, vomiting, mal- aise and runny nose. His general status was medium, hehad conscious and had hepatomegaly, tachycardia, dys- pnea, tachypnea, intercostal-subcostal retractions andbilateral rhonchus. Cardiac enzyme levels and other lab- oratory parameters were found normal. Myocarditis andejection fraction was determined as 42% in echocardiog- raphy. However, hospitalization hours between 24 and48, the patient, whose significant respiratory compromisedeveloped, was intubated and fastened to a mechanicalventilator. H1N1 is produce in nasopharyngeal swab cul- ture at the sixth day of follow-up. Because we think H1N1 virus was responsible from current myocarditis, oseltami- vir treatment was initiated. In the fourth day of the treat- ment the patient s fever returned to normal, in the ninthday a dramatic recovery was observed. In tracking echo- cardiography, a significant improvement was observed inthe ejection fraction and myocarditis picture comparedwith admission time. This case was presented in orderto remind that in a patients, who present with influenzafindings but have respiratory distress and tachycardia inaddition to lower respiratory tract infection, myocarditisshould also be considered in the differential diagnosisand to remind that promising results could be obtainedwith the early diagnosis and treatment.