Background: A veneer is a thin plastic material in the shape of a tooth which is then used to cover tooth that change in color or malformation. Procedure of veneer can be done in two ways, direct and indirect. Composite resin or porcelain is two materials commonly used to make veneer and attach to the tooth using an adhesive such as type1 glass ionomer cement. Porosity is a small hole contained within or on the surface of a material that affects the strength of a restoration. To determine the strength of attachment, a shear strength test was carried out. The purpose of this study was to determine the relationship of porosity surface area to shear strength in the attachment of indirect veneer restoration. Method: This study was a pure laboratory experimental research. The numbers of samples in this study are 4 samples. The data collection technique in this study was that each sample was observed porosity using Scanning Electron Microscope (SEM), and then tensile strength tests were carried out using Universal Testing Machine (UTM). The statistical test used is Pearson on normally distributed data. Results: The results of this study indicate a significant correlation between surface area of porosity with conventional resin cement shear strength on attachment of indirect veneer restorations with p = 0.041 (<0.05). Conclusion: There is a relationship between differences in porosity surface area on conventional cement materials with shear strength