1. Clinical findings in the psychiatric study and treatment of 48 displaced persons have been described.2. The two phases of the psychological reactions following arrival have been outlined. Common features in the symptomatology of these reactions have been described: suspiciousness and paranoid trends; co-existence of anxiety and depression; somatic reactions.3. These findings have been discussed briefly with an emphasis upon the psychosocial dynamics of mobility. A concluding statement of the differences between the displaced persons and the ordinary prewar immigrant has been made.