The　paper　reports　an　experimental　investigation　on　the　bond　stress-slip　relationship　in　concrete-filled　stainless　steel　tube　(CFSST)　structures.　Push-out　tests　were　conducted　on　twelve　specimens　covering　two　stainless　steel　grades,　two　concrete　grades,　two　cross-sectional　dimensions　and　two　internal　ring　conditions　(with　and　without　the　internal　ring).　The　effects　of　these　factors　on　the　bond　stress-slip　relationship　in　CFSST　members　were　analysed　and　discussed.　A　theoretical　model,　based　on　the　assumption　that　no　restraining　force　from　the　steel　tube　was　applied　to　the　concrete　core,　was　developed　to　predict　the　bond　stress-slip　response　of　CFSSTs　and　was　evaluated　against　the　test　results.　An　empirical　model　was　also　proposed　based　on　regression　analysis　to　replicate　the　experimental　bond　stress-slip　relationships,　which　can　be　used　as　input　data　for　analytical　and　numerical　simulations　in　future　studies　of　CFSST　structures.