Background: This study was conducted to evaluate the Shear Bond Strengthof Resin Composite Bonded to GIC Using Different Adhesives. Material and methods: 40 single-rooted premolar teeth were mounted in iron cylinders that had been filled with acrylic resin up to the cement-enamel junction. By grinding the tooth on a watercooled model trimmer, a smooth dentin surface was created at 0.5 mm below the dentino-enamel junction. Over the occlusal surface of each sample, a layer of glass ionomer cement with a thickness of 1 mm was applied. Based on the bonding agent type and application period, the tooth specimens were separated into three groups of ten samples each. Over the GIC, the composite material was layered with a 2 mm thickness before being light-cured. To replicate the clinical setting, the GIC surface was not treated to a flawless glass surface.