We reviewed 36 patients with osteoporotic vertebral fractures treated conservatively (33 females and 3 males, average age 76.3 years), and examined for predisposing factors to poor results. Continuous back pain and increased collapse on X-ray images were judged as poor results. The correlation between the results of conservative therapy and the factors (age, sex, cause of fracture, degree of collapse on first examination, existence of old vertebral fracture, BND, and MRI findings) were examined. Old age, existence of old vertebral fracture, and damage of posterior wall on MRI were correlated with continuous back pain. None of the factors was correlated with increased collapse on X-ray. More prompt therapy is considered necessary for patients with these factors.