Abstract: This study sought to ascertain the effectiveness of Insecticide Treated Bednets (ITNs) in malaria prevention among children aged 6 months 5 years in Umungwa Community, Obowo LGA of Imo State. In line with the objectives, 5 research questions and three hypotheses were postulated. A 2 group prospective cohort intervention research design was used. A sample of 100 target children were selected and randomly assigned equally to either the Treated Net (ITN) group or the Traditional Net (TBN) group. Three major WHO validated instruments were used for data collection. Statistical analysis was based on a α 0.05 level of significance. Results showed that: Malaria is endemic in the community, affecting majority of the children; there was no history of bed net use in the community prior to intervention; there was a significant difference in the malaria morbidity situation among the 2 groups studied during the intervention programme (p<0.05). As such, ITNS was generally 62.8% more effective in reducing febrile episodes among the two groups; there was a significant difference in the levels of parasitemia among the 2 groups studied during the intervention programme (p<0.05). Consequently, the use of ITNs was found to be 84.1% more effective in reducing marked level of parasitemia among the 2 groups; there was a significant difference in the mean mosquito density counts among the 2 groups studied during the intervention programme (p<0.05). In line with the foregoing, it is therefore, recommended among other things that: Having established efficacy of ITNs in malaria prevention, a bednet friendly environment should be promoted for example distribution of free or highly subsidized nets and mounting of aggressive community-wide health education campaign to promote culture of ITN use.