In the context of implementing the Merdeka Curriculum, there are a number of challenges faced by educators, one of which is in terms of assessment. Especially in PAI subjects, the application of authentic assessment is often an obstacle. One of the main problems identified is the lack of teacher understanding of the concept and implementation of authentic assessment. The objectives of this study are to (1) Find Out The Implementation of Authentic Assessment in Islamic Education Subjects in The Cognitive Aspect of The Merdeka Curriculum at Islamic Elementary School Cendekia Cianjur. (2) To Find Out The Implementation of Authentic Assessment in Islamic Education Subjects in The Affective Aspect of The Merdeka Curriculum at Islamic Elementary School Cendekia Cianjur. (3) To Find Out The Implementation of Authentic Assessment in Islamic Education Subjects in The Cognitive Aspect of The Merdeka Curriculum at Islamic Elementary School Cendekia Cianjur. This research was conducted using a qualitative approach, which focuses on implementing authentic assessment in PAI subjects in the Merdeka Curriculum. Data were collected through observation, interviews, and documentation. The data analysis technique uses the data reduction, data display, and drawing conclusions, and ferivication. From the research at SD Islam Cendekia Cianjur, it was concluded that: (1) The implementation of authentic assessment of Islamic Education on cognitive aspects has implemented assessment instruments such as written, oral, and assignment tests. (2) The implementation of authentic assessment of Islamic Education in the affective aspect is still in the development stage. The method that has been applied is direct observation, while journal assessment, self-assessment, and peer assessment have not been carried out specifically for Islamic Education subjects. (3) The implementation of authentic assessment of Islamic Education in the psychomotor aspect has implemented assessment instruments such as practices, portfolios, projects, and products to display student work. Based on the conclusion, the researcher proposes several suggestions, namely: (1) It is recommended that PAI teachers carry out specifically applying journal assessment to students in their subjects. (2) it is important for students to conduct self- and peer�assessments in PAI subjects which aims to increase self-awareness, social, and devotion to Allah SWT