Objective: To analyze the mortality of patients treated by an Emergency Mobile Care Service (SAMU) located in Paraná. Method: a cross-sectional study developed with data from care reports of 2019 and 2020; the SAMU covers 21 municipalities, regionalized into Poles A and B. The dependent variable was death and length of care. Survival functions were calculated using the Kaplan-Meier estimator and the Log-rank test; the Hazard Ratio (HR) of death by Cox regression. Results: A total of 13,326 cases were analyzed, of which 246 died. The risk of death was higher for time-sensitive requests (HR=0,17; IC95%), in 2020 (HR=2.09; IC95%), in care at the advanced support unit (HR=21.51; IC95%) and at Pole B (HR=4.26; IC95%). Conclusion: Mortality was higher at longer time intervals, in time-sensitive care, occurringin less populated regions, served by advanced support in 2020. Keywords: Mortality; Emergencies; Emergency medical services; Ambulances; Survival analysis.