In this study, the objective was to develop an instrument to assess quality of end-of-life care in the context of Spanish care homes. A 24 item scale Nursing Home End of Life Care Scale (NHEOLC) was developed through a systematic evaluation of existing tools combined with an iterative process of consultation with group experts in end of life care in long term care settings. A total of 307 health care professionals agreed to participate in the study and completed the scale. The scale was grouped in six dimensions: physical, psychological aspects and spiritual aspects of care, family care, bereavement, and patient/family preferences management. The results suggest an adequate factorial structure of the scale and good internal consistency for the total score and the subscales. In addition, the results showed significant differences depending on the size of the nursing home, the category of health professionals, and their own perceptions of his work regarding end-of-life care.Keywords: quality of end-of life; nursing homes; instrument; palliative care; health professionals.