The objective of this study was to identify the main causes for the cancellation of elective surgeries in a private institution in a municipality in the Northern region of Brazil, from August 2021 to August 2022. This is a cross-sectional, retrospective, quantitative study carried out in a private health institution, located in the municipality of Belém, capital of the State of Pará, in the Northern region of Brazil. Considering a universe of 110 physical medical records according to the period established from August 2021 to August 2022, a sampling error margin of no more than 5% and a confidence level of 95% were used. Therefore, the sample of this study is composed of 86 medical records of patients who had their elective surgical procedure canceled. The following were excluded: medical records of urgent and emergency surgeries; medical records with inadequately filled out or incomplete information; duplicate medical records. The demographic profile of the patients analyzed, the majority are female (61.63%). The age group 60 to 69 years had the highest prevalence, with a total of 25.58% of surgical cancellations. The majority of patients were brown, with 76.74% of the patients analyzed. (53.49%) patients denied any type of comorbidity, either concomitantly or in isolation. Regarding the surgical specialties with the highest cancellations, orthopedics (52.33%) and otorhinolaryngology (24.42%) were found. Among the main causes of surgical cancellation with the highest rate is related to the unfavorable clinical conditions of the patients (30.23%). Regarding organizational issues, surgeries canceled at the request of the surgeon stand out, with 26.74%.