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Background: Although many studies have explored the correlation between quality of life and survival, none have reported this relationship for specific cancers assessed at distinct time points. This meta-analysis aimed to investigate the impact of pretreatment Global Quality of Life (QOL) and functioning QOL, including physical, social, role, emotional, and cognitive QOLs, on mortality risk in patients with lung cancer. Methods: A literature search was conducted across the Cumulative Index to Nursing and Allied Health Literature (CINAHL), Scopus, and PubMed databases for articles published between their inception and December 2022. Subsequently, 11 studies were selected based on predefined eligibility criteria to investigate the relationship between pretreatment QOLs and mortality risk in patients with lung cancer. Results: Pretreatment global, physical, social, role, and emotional QOLs were significantly associated with mortality risk as follows: Global QOL (hazard ratio [HR] = 1.08 95% confidence interval [CI] = 1.03–1.13); Physical QOL (HR = 1.04 95% CI = 1.02–1.05); Social QOL (HR = 1.02 95% CI = 1.01–1.03; Role QOL (HR = 1.01 95% CI = 1.01–1.02); Emotional QOL (HR = 1.01 95% CI = 1.00–1.03). Conclusions: These findings underscore the importance of early QOL assessment after diagnosis as well as early provision of physical, social, and psychological support accommodating each patient's demands. Trial registration: The International Prospective Register of Systematic Reviews registration number CRD42023398206, Registered on February 20, 2023. [ABSTRACT FROM AUTHOR]