In 2000 a study was designed to evaluate the epidemiological factors of dengue hemorrhagic fever (DHF) in admitted children in Khulna Medical College Hospital in Bangladesh. During the period of 6 months total patients in dengue ward were 412 and children below 15 years were 125. DHF cases were 115 in number while total deaths during this period was 18 out of which 8 belonged to children group. It is noted that majority of the affected children belonged to the age group 10-14 years and the mean age was 9.2 years. The epidemic is found to affect the highest number of patients during post-monsoon period. The biting of the mosquito is marked by two distinct peak periods--morning and mid- afternoon. It is also noted that students are the most vulnerable group and primary school children were the majority.