This study investigated the effect of cognitive behavioural technique in reducing depression symptoms among adult learners in Benue State, Nigeria. The population consisted of male and female adult learners in Benue State Agency for Adult and Non-formal education, Makurdi. The study was a quasi-experimental study which adopted pre-test, post-test control group design. An intact sample of 30 adult learners - 15 in the treatment group and 15 in the control group participated in the study. The treatment group was given cognitive behavioural technique treatment while the control group was given a placebo in form of mere lectures on topics in adult literacy education. The CBT was carried out within eleven psychotherapeutic sessions that lasted for six weeks. Beck Depression Inventory (2004) was used to determine the levels of depression symptoms of each participant before and after the application of cognitive behavioural technique. Five null hypotheses were formulated and tested at 0.05 level of significance. The independent t-test was used in testing hypotheses 1, 3, 4 and 5 while ANOVA was used in testing hypothesis 2. Hypothesis 1 which states that there is no significant reduction of depression symptoms among adult learners after the application of cognitive behavioural technique was rejected (t = 9.24; p = 0.000). Hypothesis 2 which states that there is no significant effect of age on the effectiveness of cognitive behavourial technique in reducing depression symptoms among adult learners in Benue State was retained (f = 2.60; p = .609). Hypothesis 3 which states that there is no significant effect of gender on the effectiveness of cognitive behavourial technique in reducing depression symptoms among adult learners in Benue State was retained (t = 0.107; p = .288). Hypothesis 4 which states that there is no significant effect of marital status on the effectiveness of cognitive behavourial technique in reducing depression symptoms among adult learners in Benue State was retained (t = 0.110; p = .914). Hypothesis 5 which states that there is no significant effect of employment status on the effectiveness of cognitive behavourial technique in reducing depression symptoms among adult learners in Benue State was retained (t = 0.109; p = .327). It was recommended among others that since cognitive behavioural technique (CBT) was effective in reducing depression symptoms among the adult learners, adequate provisions should be made by promoters of adult literacy education in Benue State for regular application of CBT by experienced educational psychologists and guidance counselors so that they can treat adult learners who may show symptoms of depression especially as the causative factors of depression among the adults are on the increase.