This article is partially based on the Doctoral thesis (Reference 1) entitled (in English) Working aboard and job-related accidents: Health and safety conditions on merchant vessel. Divided into four sections, the paper includes: issues relating to legislation, an analysis of accidents, the research that has been done about accidents and risk factors for falling on board. The main causes of accidents are examined. Moreover, conclusions are drawn by analysing work-related accidents in the Spanish maritime transport sector through a study covering the period between 1999 and 2003. The text was updated in 2004, with the latest official data, figures which may be equally applicable to the maritime sector throughout the European Union.