Objective: To measure the bond strength of different types of lingual retainers in combination with different types of composite materials. Material and Methods: One hundred and twelve sound, extracted human lower incisors and canines were randomly divided into eight equal groups. Four types of lingual retainers; Multistrand stainless steel wire (MS), Dead-Soft (DS) eight braided wire, Ready-made stainless steel wire (RM) and Biosplint (BS) Fiber reinforced lingual retainer were bonded to the test teeth using one of two types of composite materials (Low viscosity flowable composite and Light activated orthodontic bonding system). The samples were loaded firstly by directing the force 45 degrees to the interdenal wire segment and secondly by directing the force 90 degrees at the wire composite interface. The shear bond strength of each group was determined using an Instron universal testing machine. Failure characteristics were determined at maximum load using an optical microscope. Findings were analyzed using an ANOVA and a Tukey’s post-host test. Results: Upon loading at 45 degrees angle; the MS was the weakest wire related to its inherent strength, while no statistically significant difference between DS, RM and Biosplint retainers was found; all showed the highest mean maximum load required to cut the retainers. Loading the samples at 90 degrees angulation, showed that the MS with flowable composite had the statistically significantly highest shear bond strength, while the RM-SS with Orthodontic bonding system had the lowest. No statistically significant difference between the different groups concerning the Adhesive Remnant Index (ARI), and no statistically significant correlation with shear bond strength were found. Conclusions: MS with Flowable composite showed the highest mean shear bond strength value. RM with Orthodontic bonding system showed the statistically significantly lowest mean shear bond strength.