The four treatment groups are: Group 1 - full in-person hypnosis series (8 sessions) without home practice, Group 2 - full in-person hypnosis series (8 sessions) with home practice with CDs, Group 3 - brief in-person hypnosis series (2 sessions) with home practice with CDs, and Group 4 - a minimally effective control condition (minimal biofeedback (8 sessions) designed to appear credible but have minimal effects). Subjects: 160 subjects will be recruited from the MEDVAMC Pain Management Program via posters and the program staff. Inclusion criteria: Chronic low back pain for at least 6 months, pain severity at least 5 on a 0-10 scale, and pain is primarily musculoskeletal/mechanical. Exclusion criteria: Acute and cancer pain, neuropathic etiology, severe psychopathology, active substance abuse, significant cognitive deficit, and previous participant of the pilot study on hypnosis and chronic low back pain. Outcome measures that will be administered pre- and post-intervention include: Brief Pain Inventory, Numeric Rating Scale, Pittsburgh Sleep Quality Scale, McGill Pain Questionnaire, Pain Quality Assessment Scale, Rand MHI-5, Hypnosis Treatment Outcome Measure, and the Two-Item Measures of Pain Beliefs and Coping Strategies. A process measure is the frequency of home practice.