This　paper　presents　an　experimental　study　into　the　structural　behaviour　and　strength　of　concrete-filled　stainless　steel　tubular　stub　columns　with　circular　and　square　cross-sections　subjected　to　combined　compression　and　bending　moment.　A　total　of　sixteen　concrete-filled　stainless　steel　tubular　(CFSST)　stub　columns　were　tested,　including　two　section　types　(circular　and　square　hollow　sections),　two　grades　of　concrete　infill　(C30　and　C60),　two　thicknesses　of　tube　wall　for　each　cross-section　(6　and　10　mm),　and　five　loading　eccentricity　ratios　(0,　0.2,　0.3,　0.4　and　0.5).　The　CFSST　stub　column　specimens　were　loaded　in　compression,　with　different　loading　eccentricities　applied　to　achieve　a　wide　range　of　axial　load-to-bending　moment　ratios.　This　research　provides　a　comprehensive　report　on　the　experimental　methodology　and　subsequent　observations,　including　the　failure　modes,　load-deformation　curves,　axial　load-bending　moment　curves,　strain　development　at　the　key　locations　and　values　of　ductility　index.　It　can　be　observed　that　for　circular　CFSST　columns,　ultimate　load　decreased　by　roughly　70%　with　an　increase　in　loading　eccentricity　ratios　from　0　to　0.5,　while　for　square　columns,　the　reduction　was　about　50%　under　same　conditions.　The　experimental　results　were　used　to　evaluate　if　the　existing　design　provisions　for　carbon　steel-concrete　composite　structures　is　capable　of　designing　the　investigated　CFSST　stub　columns.　It　was　found　that　the　mean　ultimate　load　to　predicted　failure　load　ratios　are　1.25,　1.32,　and　1.36,　with　coefficients　of　variations　(COV)　equal　to　0.08,　0.09　and　0.11,　for　the　European,　American,　and　Chinese　codes,　respectively.　Consequently,　the　design　approach　specified　in　the　Chinese　code　led　to　the　most　conservative　and　scattered　strength　predictions　among　the　three　codified　design　approaches.　In　contrast,　the　European　code　provides　the　most　precise　predictions　of　the　test　results,　though　there　still　remains　scope　for　improvements　in　the　ultimate　resistance　predictions　of　CFSST　stub　columns　subjected　to　combined　compression　and　bending.　©　2024