A number of studies on cancer pain have been conducted but the researchers rarely considered gender and ethnic differences in cancer pain. In this article, nursing research on cancer pain is critiqued from a feminist perspective, and directions for future nursing research are proposed. A total of 82 nursing articles published in the United States were retrieved through MEDLINE and MELVYL data retrieval systems, and analyzed and critiqued in terms of four basic elements of research from a feminist perspective (bias as resources, dependability, credibility and adequacy, and intersubjectivity). In this article, the critique is presented with four themes that may provide reasons why nursing research on cancer pain rarely incorporated gender and ethnic differences: absence of participants' own views and experiences, androcentrism and ethnocentrism, lack of consideration on contextual factors, and distant relationships between researchers and research participants. To overcome the limitations, six critical elements including gender and ethnic sensitivity, avoidance of distorted views, respectfor participants' own views and interests, trust and openness, empowerment, and multiple methods are suggested to be incorporated in future nursing research on cancer pain.