Pediatric sinusitis is common disease at children. The study show that: The positive cultures of purulence at middle meatus is 45.53 percent. The most common bacterial species recovered from the chronic pediatric sinusitis at National ENT Hospital are Staphylococcus aureuus: 36 percent, Klebsiella pneumoniae: 24 percent, Streptococcus pneumoniae: 8 percent. Staphylococcus aureuus is resistanced 100 percent with penicillin. Cephalosporin, quinolone, aminoglycosides, vancomycin are susceptible antibiotic for chronic sinusitis.