Objective: Maternal low back pain is a potent risk factor for poor health quality. We aimed to investigate the prevalence and risk factors of Low back pain (LBP) and Pelvic girdle pain (PGP) during pregnancy, and their effects on quality of life. Material and Methods: Between March and August 2018, a total 160 pregnant women, who applied to outpatient clinics of the departments of Gynecology and Physical Therapy Rehabilitation Clinic, were included in this prospective study. Demographic characteristics, obstetric history of the participants, and LBP and PGP status during and before pregnancy were recorded. Severity of pain, functional capacity, Quality of life (QoL), and anxiety depression status were assessed using visual analogue scale (VAS), Oswestry Disability Questionnaire (ODQ), World Health Organization Quality of Life Scale Short Form (WHOQOL-BREF), and Hospital Anxiety and Depression Scale (HADS), respectively. Results: The prevalence of LBP and PGP were 73.4% and 28.12%, respectively. Total ODQ and VAS were significantly high in groups with LBP or PGP (p=0.000 and p=0.000, respectively). Of the WHOQOL-BREF subheadings, 'the general health' and 'physical health' parameters were significantly lower in women with LBP, whereas the 'social relationship' parameter was significantly low in those with PGP (p=0.003, p=0.002, and p=0.049, respectively). The increase in anxiety and depression scores was only associated with LBP (p=0.019 and p=0.006, respectively). Conclusion: LBP and PGP during pregnancy adversely affect QoL, leading to functional limitations, depression, and anxiety disorders.