Knowledge of first aid in accidents in junior high school students still does not understand what first aid is in accidents. so that proper first aid health education in accidents needs to be done to junior high school students. This study aims to analyze the effect of health education through social media zoom on first aid behavior in accidents in junior high school students. The research design used is analytical with a pre-experimental approach, one group pre-test and post-test design. The variables of this study are the effect of health education through zoom on junior high school students' knowledge as an independent variable and the level of knowledge about first aid in accidents as the dependent variable. The population in this study were all 2nd grade students in SMP Bahrul Ulum Putat Jaya Surabaya in 2021, as many as 115 respondents. Samples were taken by purposive sampling technique. Data were collected using a questionnaire instrument and continued with the Wilcoxon Siged Rank Test statistical test with the help of SPSS version 25. The results showed that after health education, respondents' knowledge increased with a good percentage of 32 respondents (27,8%), only 19 respondents (16,5%), and less than 64 respondents (55,7%) to good 99 respondents (86.1%), only 16 respondents (13,9%) and less than 0 respondents. . KEYWORDS: Health Education, Zoom, Knowledge, First aid in accidents THE EFFECT OF HEALTH EDUCATION THROUGH ZOOM ON KNOWLEDGE OF JUNIOR HIGH SCHOOL STUDENTS ABOUT FIRST AID IN ACCIDENTS AT BAHRUL ULUM SMP PUTAT JAYA SURABAYA 0.05 then this shows p < which means H1 is accepted. This shows that there is an effect of health education through zoom on junior high school students' knowledge of first aid in accidents. Health education through zoom can increase the knowledge of junior high school students in first It was found that the p value = 0.000 and = aid knowledge in accidents.