This paper examines self-employment among immigrants in Sweden. There are differences in the self-employment rate between immigrants and the native population and between different immigrant groups, both in the raw data and after controlling for variables such as age, gender, education and civil status. The study shows that non-Nordic immigrants in Sweden who arrived at an early date have higher self-employment rates than the native population. It seems as if self-employment among immigrants is to sc,me extent positively correlated with time elapsed after arrival in the country. A number of possible explanations for the observed differences in self-employment between immigrants and natives and between different immigrant groups are presented in the study. Plausible explanations for the observed differences in self-employment rates are differences in traditions from the home country, differences in the labour market situation, and often a lack of knowledge among immigrants about the practical and formal matters an individual encounters when trying to establish a business.