One of the main concerns of construction site managers, as well as insurance companies in the construction industry is the large number of construction accidents. In this study all the accidents occurred on construction sites within the period of 2002-2013 in South Australia (SA) have been considered to investigate the main factors affecting the occurrence of construction accidents. To this end, the available database was analysed from different prospective such as the year of accident, month of accident, time of accident, new worker (Yes/No), age of worker and size of the company. The findings revealed that newly-introduced regulation in SA has had a positive effect in reducing the number of accidents on construction sites. Nevertheless, the findings regarding the impacts of the level of experience of workers and the month in which accidents had happened showed contradictory results against the findings of previous studies. The study concludes with proposing future areas of research on the topic.