The purpose of this study was to examine the service quality of nursing units in Bangkok textile factories. Descriptive survey research was combined with a qualitative design using participative observation. The sample consisted of factory managers, nurses, and employees. Data were collected between November 2001 and February 2002 using questionnaires, observation, in-depth interviews, and focus groups. Nurses' education levels and quality of design and arrangement of nursing units explained 15.7% of the variance in service quality. Furthermore, qualitative data supported clients' satisfaction with service quality, except for the tangibility of the service. These findings suggest that the quality of nursing service units could be improved by management's attention to unit design, arrangement of nursing units, and nurses' education levels. Hiring registered nurses and restructuring nursing units are recommended.