Behavioral activation is part of some cognitive behavioral pain management treatments (Ehde, Dillworth, & Turner, 2014) that include - in addition to BA - cognitive re-structuring. There is evidence that such treatments are effective in reducing symptoms associated with chronic pain (Ehde et al, 2014; Williams, Eccleston, & Morley, 2012). The size of the effect of such treatments varies from small to moderate, depending on the outcome variable analyzed. Thus, according to the results of the meta-analysis conducted by Williams and colleagues (2012), compared with the usual treatment, cognitive-behavioral interventions developed for pain management have small but significant effects on pain (SMD = -0.21, CI 95% CI = -0.37 to -0.05, Z = 2.35, p <0.05) and disability (DME = - 0.26, CI 95% = -0.47 a -0.04, Z = 2.35, p < 0.05), and moderate effects on mood (DME = -0.38, 95% CI = -0.57 to -0.18, Z = 3.84, p <0.01) and catastrophism (DME = -0.53, 95% CI = -0.76 to -0.31, Z = 4.58, P <0.01). However, in relation to other active treatments, their effects on disability (DME = -0.19, 95% CI = -0.33 to -0.05, Z = 2.66, p <0.01) and catastrophism (SMD = -0.18, 95 % = -0.36 to 0.00, Z = 1.92, p = 0.05) appear to be small, and no significant effects have been found for pain and mood. In addition, further studies are needed to examine the active components of cognitive behavioral therapy for pain (Ehde et al., 2014). Although BA may be one of the effective components of cognitive behavioral therapy, the intensity and emphasis placed on behavioral activation within cognitive behavioral treatments is small, and is generally limited to use in one session, so it is not known yet whether BA in isolation could have beneficial effects on pain. Furthermore, to our knowledge, no studies have been conducted to examine the efficacy of BA to reduce depressive symptoms in patients with chronic pain (beyond the abovementioned case studies).