This　test　was　investigated　on　the　compression　failure　in　eccentric　reinforced　concrete　square　cross-section.　In　total　twelve　different　scale　specimens　were　eccentrically　compressed　with　size　of:　200×200mm;　400×400mm;　800×800mm.　specimens　were　divided　into　3　groups　with　4　each.　Only　six　columns　have　been　investigated　in　this　paper　thus　a　column　by　eccentricity.　The　main　point　were　based　on　the　existence　of　size　effect　phenomenon　on　cross-section　components　collapsed　with　different　sizes　to　the　ultimate　bearing　capacity　and　the　cross-section　strain,　ductility,　deflection,　and　other　failure　characteristics.　Analysis　of　the　experimental　data＇s　showed　that　the　size　effect　phenomenon　exists.　©　(2012)　Trans　Tech　Publications,　Switzerland.