An　innovative　steel　tube　confined　rubberized　concrete　column　is　presented　in　this　research　to　promote　waste　rubber　recycling　and　improve　the　mechanical　properties　of　conventional　concrete.　The　axial　compressive　behavior　of　circular　steel　tube　confined　rubberized　concrete　(STC-RuC)　stub　column　specimens　is　experimentally　investigated.　Thirty-two　specimens　including　twenty-eight　STC-RuC　specimens　and　four　referenced　circular　steel　tube　confined　conventional　concrete　(STCC)　column　specimens　were　fabricated　and　tested.　Experimental　vari-ables　included　rubber　particle　size,　volume　replacement　ratio　of　the　rubber　particles,　steel　tube　thickness,　and　concrete　compressive　strength.　The　failure　modes,　ultimate　strength,　strain　characteristics,　rigidity,　confinement　effect,　and　ductility　were　evaluated.　The　tests　showed　the　failure　of　the　STC-RuC　specimens　under　axial　compression　was　by　the　core　concrete　shear　failure　and　the　steel　tube　local　buckling.　Also,　the　ultimate　strength　of　STC-RuC　specimens　was　directly　proportional　to　the　rubber　particle　size　and　steel　tube　thickness,　and　it　decreased　with　the　increasing　volume　replacement　ratio.　With　the　increasing　volume　replacement　ratio　in　STC-RuC　specimens,　the　ductility　improved,　whereas　the　rigidity　decreased.　The　rigidity　increased　with　the　increasing　rubber　particle　size;　compared　with　concrete-filled　steel　tube　(CFST),　rubberized　concrete-filled　steel　tube　(RuCFST),　and　STCC　stub　column　specimens,　the　STC-RuC　specimens　had　better　axial　compression　behavior　with　a　smaller　confinement　factor.　Further,　the　ultimate　strength　of　STC-RuC　specimens　was　evaluated　using　various　calculation　models.　The　simplified　formulae　for　the　prediction　of　ultimate　strengths　were　also　presented.