The indirect cause of maternal death in Indonesia is “3T” factors, one of which is being late in knowing the danger signs of pregnancy. Health workers need to be aware of this because there is currently a pandemic that can make limited time for pregnancy checks. It can cause pregnant women to not have enough time for health education about the dangerous signs of pregnancy, so we need the right media for health education about danger signs of pregnancy. Industrial revolution 4.0 makes us unable to avoid using technology, including in the world of health. Augmented reality is part of it. It can be media for health education that you can use every time and everywhere with direct interaction. So, pregnant woman can use it to improve their knowledge. This study aims to determine whether there is knowledge improvement from pregnant women about danger signs of pregnancy after using augmented reality. This is a quantitative research with one group pre-post test design which requires 30 respondents. The result shows that there is an effect of augmented reality media on the knowledge of pregnant women about the danger signs of pregnancy in the form of increasing knowledge(p=0,001)