This study aimed to develop an achievement test for socioscientific issues that are not available in the relevant literature. Since this study is research conducted to detect existing situations, it is in the survey design, which is one of the quantitative research designs. The study group of the research consists of 233 secondary school 7th grade (12-13 years old) students studying in secondary schools in Malatya city center in the 2021-2022 academic year. The steps used in the relevant literature were used in the development of the test. These steps: Determining the purpose, subject and outcomes, creating the specification table and item pool, obtaining expert opinions, determining the item difficulty level and item discrimination index, and correcting or removing questions that are not at an acceptable level. As a result, it was validated because of the opinions received from experts in order to measure their success in socio-scientific issues. It consists of 26 questions at all cognitive levels, and according to the analysis results, most of the items are of medium difficulty (p = .547) and have a high power of distinguishing students (r = .519). An achievement test with an adequate reliability coefficient (KR-20 = .824) was developed. It is thought that the achievement test for socioscientific subjects will be developed for secondary school students and will contribute to the researchers working in this field and the literature as it is the first study in the field.