This　study　proposes　a　realistic　model　for　the　bond　stress–slip　relation　between　concrete　and　carbon　fiber-reinforced　polymer　plates　under　fatigue　loading.　Double-lap　shear　experimental　tests　were　implemented　to　explore　the　bond　stress–slip　behavior　under　fatigue　loading.　The　bond　stress–slip　relation　under　fatigue　loading　was　derived　as　a　function　of　the　loading/unloading　linear　slip,　the　stiffness　of　the　unloading　branch　in　slip　and　the　number　of　fatigue　cycles.　In　this　model,　the　stiffness　of　the　unloading　branch　in　slip　was　derived　from　the　simplest　linear　fitting　of　the　experimental　data　based　on　the　bond　stress–slip　relationship.　Numerical　analyses　using　the　proposed　model　compared　well　overall　to　the　experimental　fatigue　results.　©　2017,　Iran　University　of　Science　and　Technology.