This study aims to improve student learning outcomes onhuman respiratory system material. This study uses a classaction research design proposed by Kemmis and MCTaggart. The subject of the research was grade V studentsSD Inpres Kakaskasen II which totaled 39 students. theresults showed that in the first cycle the percentage ofstudent learning outcomes only reached 28% and in thesecond cycle the percentage of learning outcomes reached89.74%. Based on the results of these studies it can beconcluded that the application of the demonstration learningmodel can improve the learning outcomes of humanrespiratory system material in class V students SD InpresKakasksen IIKeywords: demonstration learning model, learning outcomes, humanrespiratory system.