[Purpose] The purpose of this this study was to examine the immediate effects of intervention of proprioceptive neuromuscular facilitation (PNF), neuromuscular joint facilitation (NJF) and NJF+pelvic floor muscle (PFM) exercise. [Subjects] Thirteen young people (5 males, 8 females) who had chronic low back pain on one side for more than 6 months. [Methods] Subjects were asked to lie on their sides with the painful side uppremost. The subjects received PNF, and NJF, NJF+PFM exercise treatments. The changes in the cross-sectional area of the multifidusmuscle were measured using ultrasonography. [Results] The cross-sectional area of the multifidus muscle of NJF+PFM group showed the largest increases on both the sides with and without pain. [Conclusion] Our results show that chronic low back pain can be improved by a combination of PFM exercise and the NJF pattern.