This study explored depressive problems in drug addicted patients. Subjects were 114 heroin addicted patients undergoing treatment in a V.A. hospital. The methods included intensive interviews, the MMPI, the Rotter ISB Test, a psychological diary, and observations. All of the self-report techniques used indicated that many of the patients were experiencing strong depressed feelings. This depression, however, was not as clearly evident in the overt behavior of the patient.