To determine the prevalence of high levels of emotional exhaustion and depersonalization and low personal accomplishment in nursing professionals in oncology services. A meta-analytical study was performed. The search was carried out in March 2017 in Pubmed, CINAHL, Scopus, Scielo, Proquest, CUIDEN, and LILACS databases. Studies using Maslach Burnout Inventory for the assessment of burnout were included. The total sample of oncology nurses was n=9959. The total number of included studies was n=17, with n=21 samples for the meta-analysis of emotional exhaustion and n=18 for depersonalization and low personal accomplishment. The prevalence of emotional exhaustion and of depersonalization was 30% (95% CI=26%-33%) and 15% (95% CI=9%-23%), respectively, and that of low personal performance was 35% (95% CI=27%-43%). The are many oncology nurses with emotional exhaustion and low levels of personal accomplishment. The presence and the risk of burnout among these staff members are considerable.