125 patients with sacroiliac joint pain were randomized to either fluoroscopic-guided or landmark-based injection of corticosteroid and local anaesthetic. The primary purpose of this study was to compare pain scores, including average and worst pain, between groups after 1 and 3 months. Mean score and change from baseline were both compared. Mean scores for average pain did not significantly differ between groups at 1 and 3 months, though reduction from baseline in average pain was significantly greater in the fluoroscopic-guided injection group. Worst pain scores, including both mean and reduction from baseline, did not significantly differ between groups at 1 and 3 months.