There is increasing concern regarding the quality of palliative nursing care. However, despite the growing number of studies identifying related variables, there is still a paucity of studies analyzing models of how these variables interrelate.

The study aimed to identify the role played in the quality of palliative care of nursing professionals by the variables meaning and death anxiety and to investigate the mediating role of psychological well-being and engagement.

176 palliative nursing professionals participated, selected by non-probabilistic convenience sampling using the snowball method. A simple mediation analysis and a multiple mediator model were performed in parallel, and data were collected using a paper and online questionnaire between January and May 2018.

Well-being mediated the impact of meaning (indirect effect = 0.096, SE = 0.044, 95% confidence interval (CI): 0.028, 0.213) and death anxiety (indirect effect = −0.032, SE = 0.013, 95% CI: −0.064, −0.010) on the quality of care. Engagement, on the other hand, only mediated the impact of meaning (indirect effect = 0.185, SE = 0.085, 95% CI: 0.035, 0.372), while the indirect effect of death anxiety with the quality of care through engagement was not statistically significant (indirect effect = 0.008, SE = 0.009, 95% CI: −0.004, 0.032).

Death anxiety is not directly related to the quality of care, but rather has an effect through psychological well-being, a variable acting as a mediator between the two. The effect of meaning on the quality of care is explained by the mediation of both engagement and psychological well-being, and its impact on the quality of care is thereby mediated by more variables than death anxiety.