Over the past five years, concerns have been raised by the scientific community and the media about the potential of endocrine disrupters to harm the health of both humans and wildlife. There are now many reports describing the increasing incidence of disorders of the male reproductive tract, from poor semen quality to testicular cancer. So far the emphasis has been on implicating chemicals in the environment with oestrogenic activity as causal factors, since the weight of epidemiological and biological evidence suggests that inappropriate exposure to oestrogen during early development can induce the types of disorders reported. Currently, there is no definitive evidence that environmental oestrogens are responsible. This article will review the data which has linked endocrine disrupters, specifically environmental oestrogens, with effects on male reproduction. The aim is to provide an overview of the current understanding about endocrine disruption in males as well as highlighting the many difficulties faced in order to establish whether the presence of endocrine disrupters in our environment is a health risk.