Ten cases of severely injured open fractures of the forearm were treated in our clinic. In six of them, internal fixation using intramedullary nail was undertaken. In two, plate, and in further two, a combination of plate and intramedulary nail was used. Internal fixation and tendon and nerve repair was performed primarily. Skin coverage was delayed. After removal of fixators, refractures occured in the group using a combination of plate and intramedullary nail. One nonunion was observed in the plate fixation group. In all but one case, solid union was obtained. We had no experience of deep infection in this series.