There have been a myriad of research studies concerning SME e-Commerce adoption. However, the findings of these studies with regard to adoption factors have often been fragmented and contradictory. This paper analyses the previous research and synthesises the findings into a cohesive model of factors affecting SME adoption of e-Commerce. Eight meta-factors were identified: (1) perceived relative advantage; (2) perceived compatibility; (3) perceived complexity; (4) pressures from trading partners; (5) pressures from competitors; (6) external change agents; (7) knowledge and expertise about e- Commerce; and (8) management attitudes towards e-Commerce. These meta-factors were further grouped into three contexts: technological, environmental and organisational.