Abstract: A therapeutic device to mobilize the spinal joints and soft tissues surrounding the human spine. The device includes two substantially solid spherical balls mounted on a shaft for independent rotation. In one embodiment, the balls have a spherical to elliptical configuration and comprise an inner ball portion of a variable density synthetic plastic material and with an outer covering or portion comprised of a flexible material. The balls have a confronting area forming a substantially elliptical shape extending from a major spherical ball portion. Another embodiment comprises two spherical rubber balls having an inner ball formed of hard material to assist in the mobilizing operation and an outer flexible rubber cover. In either embodiment, the balls may be mounted on the shaft via suitable sleeves disposed through the inner ball portions. The device may be used in self-treatment or may be applied by another person.