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Breast cancer antiestrogen resistance 4 (BCAR4) is a novel long noncoding RNA. It was originally identified in a screen for genes responsible for the development of resistance to antiestrogens in breast cancer cells and plays a major role in various tumors. However, the clinical diagnostic role of BCAR4 in tumors is not completely understood. This current meta‐analysis aimed to comprehensively explore the potential role of BCAR4 as a prognostic biomarker in a number of cancers. Five public databases PubMed, EMBASE, Web of Science, Wiley Online Library, and Medline were used to search for articles. Nine studies comprising 1,293 patients were included in this meta‐analysis. The results of analysis showed that BCAR4 expression in human cancer was significantly associated with poor overall survival (hazard ratio [HR] = 1.98, confidence interval [CI]: [1.71–2.29]), p < 0.00001, and high BCAR4 expression was associated with clinical stage (OR and its 95% CI was 3.30 [1.99–5.46], p < 0.00001), distant metastasis (OR = 3.83, 95% CI: 2.15–6.82, p < 0.00001), and lymph node metastasis (OR and its 95% CI was 2.91 [1.62–5.25], p = 0.0004) in patients with cancer. Furthermore, the results revealed the prognostic significance of BCAR4 in gastrointestinal malignancy, breast cancer, and osteosarcoma (HR and its 95% CI were 2.05 [1.56–2.68], p < 0.00001; 1.78 [1.46–2.16], p < 0.00001; and 2.47 [1.41–4.34], p < 0.00001, respectively). This meta‐analysis indicated the potential value of BCAR4 as a biomarker for predicting a poor prognosis in patients with cancer. [ABSTRACT FROM AUTHOR]