This study aimed to clarify and prevent the present state of low back pain among care-givers. A survey was conducted on 40 care-givers (14 men and 26 women; age 22 to 54 years; average age, 43 years) at three care facilities to identify care-givers with low back pain. After a physical examination, both a lumbar X-ray in the standing position and MRI were done. Since the results of the survey showed poor posture was related to low back pain, Lumbar flexion angles were continuously measured using an electrogoniometer. Spondylolysis was seen in 3 patients, while apophyseal separation was confirmed in another two. MRIs Showed that changes in intervertebral disc luminance varied from mild to severe among subjects. In addition, MRIs revealed posterior protrusion of the intervertebral disc in six patients. Results clarified that while none of the subjects had organic diseases to cause impairment of ADL, individual differences in pain tolerance existed. Thirty minute electrogoniometry suggested that certain work-related postures put stress on the lumbar spine. In order to prevent low back pain in care-givers, it is necessary to improve working conditions.