Background: Influenza has been reported since the 16th century, WHO referred to this novel strain of influenza A (H1N1) as swine flu approximately 500 million people were affected by the H1N1 virus. The Aim of this study to understand the knowledge, attitude, and experience of under-five mothers regarding swine flu. Objectives of the study: To assess the knowledge and attitude of under-five mothers, level of knowledge of participants with selected demographic variables, and describe the lived experience under-five mothers, develop validate booklet regarding swine flu. Sample other of underfive children, purposive sampling technique, and nesting of the sample were done. 30 samples were required for quantitative research. Data saturation end with eight samples for qualitative research. Data Analysis: Descriptive and inferential for knowledge and attitude. Phenomenological Colaizzi (1978) were used for mother lived experience. Result 60% had poor knowledge, 36.7% had the moderate knowledge, and 3.3% had good knowledge, mean knowledge 11.10 and standard deviation was 3.28. In addition, attitude regarding swine flu 43.8% had a poor attitude, 37.5% had moderate attitude and 18.7% and Mean 17.25 & standard deviation 7.74., Religion, Number of