Abstract : The aim of the present study was to evaluate the push-out bond strength of Rebilda bundle fiber posts cemented using different luting cements. Roots of thirty single-rooted mandibular first premolars were used in the present study. The root canals were instrumented using Protaper files and obturated with size X3 guttpercha. A space for the post was created by removing the gutta-percha from the coronal and middle thirds of each root using peeso reamers leaving 5mm apically to maintain apical seal. The roots were randomly divided into three groups (10 each). Ten roots were filled by Rebilda bundle fiber posts cemented according to the manufacturer instructions using Rebilda DC kit. Ten roots were filled by Rebilda bundle fiber posts cemented with self-adhesive resin cement. Ten roots were filled by Rebilda bundle fiber posts cemented with resin-modified glass-ionomer cement (GIC). Each root was cut into three 2mm-thick slices (cervical, middle and apical) and 30 specimens were prepared for each group. The slices were marked and labelled to ensure that the load is applied apico-cervically. Universal testing machine was used to measure the push-out bond strength. The push-out bond strength of the posts at the cervical root slices was significantly higher than the push-out bond strength of the posts at the middle and apical root slices. For the cervical and middle root slices, there were no significant differences between bond strength values of the posts cemented using Rebilda DC kits and the posts cemented using self-adhesive resin cement. The use of resin-modified GIC for posts cementation produced the lowest push-out bond in comparison with the other luting agents. It might be possible to recommend the cementation of bundle fiber posts using self-adhesive resin cements (with-out adhesive bonding agent) or resin-modified GIC.