Thirty-two hospital social workers, fourteen of them directors of social work services and eighteen direct practitioners, were interviewed about their perception of the factors influencing social workers' contribution to the resolution of ethical dilemmas in general hospitals in Israel. Findings revealed that while ethical decision-making in hospitals is an interdisciplinary process, social workers' contribution to the process is affected by rivalry between social workers and other members of the health team, personality differences, type of ward and the nature of the ethical dilemma. Participants of the study had quite a clear perception of their role and of the unique knowledge-base social work can offer, including knowledge of the individual and family life course, understanding and skills in coping with diseases, and systems thinking. In order to increase their influence in ethical decision-making, the hospital social workers felt they must put more effort into developing their relationships with the other professionals involved in ethical decision-making both by making themselves more indispensable and by making their contribution explicit through greater documentation of their activities. The findings also implied that in order to gain more power and be accepted as equal partners in multidisciplinary teams, hospital social workers should improve their communication skills when interacting with representatives of other heath care professions.