Although the number of publications on formative assessment in science education has long been high, there is no bibliometric analysis or scientific mapping in the literature to understand research trends in formative assessment research. This research aimed to examine the bibliometric results of articles on formative assessment in science education. Based on the criteria for inclusion and exclusion, 94 articles were selected for analysis. The results show that between 2015-2016 and 2020-2022, the number of publications on formative assessment increased substantially. Among the top ten institutions that contributed to the research are three institutions from the United States. The results also show that the United States had the most publications. Analysis of the co-citations showed that the "Journal of Research in Science Teaching," "Science Education," and the "International Journal of Science Education" were cited more than 100 times. The three most cited studies were published in "Assessment in Education: Principles, Policy, and Practice." The results show that the researcher used formative assessment, students, science education, teaching, education, engineering education, curricula, STEM, and e-learning in research on formative assessment. In light of the obtained results, practical suggestions for further studies are made in the conclusion.