Purpose: The purpose of this study is tho exemine the influence of the knowledge of MSMEs owners about halal and religious certification on the intention to obtain halal certification which is mediated by the attitude of MSME owners. Theoretical framework: The relationship between the knowledge of MSMEs owners about halal certification and religiosity to obtain halal certification can be mediated by the Theory of Planned Behavior. This theory focuses on the behavior of MSME owners to obtain halal certification. This is influenced by the knowledge of UKM owners about halal certification, religiosity, and the attitude of MSME owners in East Java. Design/Methodology/Approach: The research used a quantitative approach with a sample of 140 MSME owners in East Java, Indonesia. The data were analyzed using Structural Equation Modeling (SEM). Findings: The results showed that the knowledge of MSME owners about halal certification and religiosity influenced the intention to obtain halal certification. The attitude of MSME owners in East Java can mediate the relationship between MSME owners' knowledge of halal certification and religiosity to obtain halal certification. Research, practical & social implications: This study aims to encourage the intention of MSME owners to obtain halal certification by using the Theory of Planned Behavior (TPB) approach. According to the Theory of Planned Behavior, East Java UMKM owners will follow halal certification because of their mindset which is shown by their desire for it. Originality/Value: Examine the role of the attitude of the MSME owner in mediating the relationship between the knowledge of the MSME owner about halal certification and religiosity on the intention to get halal certification by implementing the Theory of Planned Behavior.