Watsu therapy is a water relaxation intervention technique performed individually in a warm pool with music and peaceful settings involving harmonious rotational movements, stretching, tractions on the joints and pressures at the points of muscle tension. This study evaluated the effect of Watsu therapy on psychological aspects (anxiety and minor psychiatric disorders) and on the quality of life of a patient with temporomandibular disorders. The patient answered three questionnaires: STAI (State-Trait Anxiety Inventory) and GHQ (Goldberg Health Questionnaire) to assess anxiety and psychiatric disorders respectively, and WHOQOL- Brief (World Health Organization Quality of Life) to assess quality of life. Watsu therapy has been used in patients with temporomandibular disorders (TMD) such as myofascial pain diagnosed by RDC/TMD (Research Diagnostic Criteria for Temporomandibular Disorders). Psychological aspects and quality of life were assessed before and after Watsu therapy. The results after treatment showed relevant and significant improvement on all indices evaluated. Therefore, it was shown that Watsu therapy was effective in reducing anxiety and minor psychiatric disorders, as well as improved quality of life of patients with temporomandibular disorder.