In this study, we comprehensively investigated the expression pattern of SIRT7 and its association with the prognosis of breast cancer patients using several bioinformatics web servers including Tumor Immune Estimation Resource (TIMER), Gene Expression Profiling Interaction Analysis (GEPIA), The Human Protein Atlas (HPA), UALCAN, Breast Cancer Gene-Expression Miner (BC-GenExMiner), and Kaplan-Meier plotter. Here, SIRT7 is linked to breast cancer.