This thesis deals with various legal aspects concerning the servus fructuarius in classical Roman law. Slavery was an important and essential part of everyday?s life in ancient Rome. Slaves were ?res? and ?personae? at the same time. Therefore it was possible to establish a usus fructus on slaves. A servus fructuarius was a slave, on whom another person, not the owner, had a usus fructus. The first part of the thesis deals with the possibility of the usufructuary to acquire through the servus fructuarius. Everything which is acquired by the slave ex re fructuarii or ex operis servi belongs to the usufructuary. Furthermore some contentious cases - in which it was not clear who acquire though the slave - should be shown. Moreover the thesis deals with a possible noxally liability of the usufructuary. Finally the cases of the servus fructuarius fugitivus (a servus fructuarius, who ran away), the servus fructuarius manumissus (a servus fructuarius, who was freed by his owner) and the servus fructuarius subreptus (a servus fructuarius, who was stolen by another person) will be discussed.