Methods: this study included the Quantitative research approach, pre-experimental one group pre–test post-test research design. 80Mothers of under-five children were selected by using Non-probability Convenient Sampling technique. On first day pre- test was done by using the Self-administered questionnaire, Explain about Protein energy malnutrition. On 7th day post-test was done by using Self-administered questionnaire, to check the effect of planned teaching program on knowledge regarding Protein energy malnutrition among the mothers of under-five children. The data obtained were analyzed and interpreted by using both descriptive and inferential statistical in terms of frequency, percentage, and chi-square.

Results: The knowledge regarding Protein Energy Malnutrition among Mothers of under-five children was assessed. The ‘z’ value 16.02 is significantly higher than the table value 1.96 at 0.05 level significance. This indicates that there was a difference in the pre-test and post-test knowledge score of respondents and the Information Booklet is effective in improving the knowledge score of mothers of under five children, hence the H₁ hypothesis was proved and accepted. There is an association between post- test knowledge score with selected Socio- demographic variables; hence the research hypothesis (H₂) is accepted.

Conclusion: This study concludes that there is improvement in the level of knowledge of mothers of under five children which indicate that the Information Booklet is effective.