Juniperus is an important genus widely distributed in the North hemisphere and it is used in folk medicine as well as source of cedarwood oil, a natural product with several industrial applications. The genus has attracted a great interest in the scientific communits and it has been the subject of more than 320 published phytochemical studies in the last 35 years. It is mainly a source of sesquiterpenes, diterpenes and lignans, some of them with very promising biological activities. The compounds identified from Juniperus species during the period 1970-2004, except essential oils fractions, are compiled in this report together with the biological activities of the Juniperus extracts and of the isolated pure compounds.