Aim: To compare the shear bond strength (SBS) to dentin, of three different glass ionomer cements (GIC): Ketac Universal (with and without conditioner), Fuji IX, and Ketac Molar. Materials and methods: Forty-eight extracted human maxillary premolars were selected. Depth holes measuring 1.5 mm were drilled in the deepest part of central fossa of each tooth sample. Occlusal surfaces were ground on a trimmer to expose flat dentinal surface and polished. The specimens were then embedded in autopolymerizing acrylic resin. Groups I, III, and IV specimens were restored with Ketac Universal, Fuji IX, and Ketac Molar respectively after conditioning. Group II specimens were restored with Ketac Universal without conditioning. A cellophane tube of diameter 4 mm was used to prepare GIC restorations. The samples were kept in water bath at 37°C for 24 hours. Each GIC specimen was loaded in a universal testing machine (INSTRON) with a crosshead speed of 0.5 mm/min. The bond strength (MPa) was calculated by dividing the shear force in Newton (N) by area of adhesion (m²). Statistical analysis: The results were statistically analyzed by Welch test and analysis of variance (ANOVA) test with pairwise “t” test. Results: The mean value of SBS was found to be highest for Ketac Molar, followed by Ketac Universal with conditioner, and Fuji IX GIC, and was lowest for Ketac Universal without conditioner. Conclusion: Ketac Universal, when used without conditioner, showed significant values of SBS, but is less than other conventional GICs.