This study, Quality of nursing care of staff nurses of a selected provincial hospital was conducted to admitted post-partum mothers. The researchers made use of a researcher-made questionnaire designed to determine the quality of nursing care based on Lydia Hall's (1965) Nursing Theory: Care, Cure, and Core. On the quality of nursing care in terms of the three components it revealed that care, cure, and core is very satisfactory. On the significant difference on the quality of nursing care when the nurses are grouped and compared according to age, gender, and rotation if revealed that there is a significant difference in care when staff nurses are grouped according to age. There is no significant difference in cure and core when staff nurses are grouped according to age. On the quality of nursing care rendered by staff nurses between the different aspects of nursing when paired as Care and Cure, Care and Core, and Cure and Core it shows that there is a significant relationship to the different aspects of nursing care when grouped as care and cure, care and core, and cure and core. Based on the results, it is recommended that the component of care should be given emphasis by the institution in all ages in the nursing service.