The surface area of porosity is the factors that affect the mechanical strength of dental material. Porosity is an air bubble or a very small hole found on the surface or inside a material. Shear strength is one of the mechanical strengths that can be tested on a material. Good dental restoration is a restoration that has good mechanical strength. The purpose of this study was to determine the relationship of differences in porosity surface area to shear strength in the attachment of indirect veneer restorations. This study used a pure laboratory experimental method. The number of samples in this study is 4 samples. The data collection technique in this study was that each sample was observed porosity using a Scanning Electron Microscope (SEM), then tensile strength tests were carried out using Universal Testing Machine (UTM). The statistical test used is Pearson on normally distributed data. The results of this study indicate a significant relation between differences in porosity surface area on the shear strength of self-adhesive resin cement on the attachment of indirect veneer restoration with a value of p = 0.002 (p <0.05). Based on the results of these studies, it can be concluded that there is a relationship between differences in porosity surface area with the shear strength of self-adhesive resin cement to the shear strength of indirect veneer restorations.