Study design: Retrospective cohort study. Purpose: Spondylodiscitis is the most common infectious disease of the spine which can be treated either conservative or surgery. Nowadays, there are only a few studies on radiographic outcomes. The purpose of this study was to investigate the long-term radiographic outcomes of conservative treatment compared with surgical treatment in single-level infective spondylodiscitis patients. Methods: Patients diagnosed with single-level infective spondylodiscitis in lumbar vertebrae during July 2009 to September 2019 were eligible for inclusion. Radiographic evaluation comprising lumbar lordotic angle, segmental kyphotic angle, and foraminal height of was performed on lumbar lateral view before treatment and at the 1-year follow-up. Results: A total of 116 patients (mean age; 60 years; 53 males) were included. Except for length of hospital stay, which was significantly longer in the surgical group, there were no significant differences for any of the other demographic or clinical characteristics between groups. All pre-treatment radiographic parameters in the surgical group were worse than in the conservative group. At the 1-year follow-up, conservative treatment patients demonstrated significantly worse segmental kyphosis (p