Application Of Mobile Video Effective To Increase The Knowledge And Attitude In Managing Diarrhea Of The Mothers And To Reduce Diarrhea Duration Of Under Five Children. Proper handling of diarrhea and education of diarrhea management in mothers can decrease morbidity and mortality of children under five due to diarrhea. This study aimed to examine the effectiveness of video education about management of diarrhea toward knowledge and attitude of the mother, and duration diarrhea of under five children. The design applied a pre and post-test with the control group. The total sample was 71 respondents divided to control group and interventions were selected by consecutive sampling technique. The results showed that there were significant differences between knowledge and attitude before and after education in interventions (knowledge: p= 0.002; attitude p= 0.008). There was a significant difference between score knowledge and attitude control group and interventions (knowledge p= 0.008; attitude p= 0.001), but there was no significant difference between duration diarrhea control group and interventions (p= 0.796). Video education enhanced knowledge and attitude of the mother, but not to the duration of diarrhea. Audiovisual can be considered as a nursing intervention because its effectiveness to increase knowledge and attitude of the mother in handling the children with diarrhea.