This research aimed to determine the increase in knowledge of Diabetes Mellitus patients through a booklet. This quantitative study followed a quasiexperimental design with two groups of pretest-posttest, at Kartasura Sukoharjo community health centre in April 2019. We used the purposive sampling technique with 40 samples divided into 20 samples in the experimental group and 20 samples in the control group. The patients aged 50-65 years, registered at the Chronic Disease Management Program (prolanis) Kartasura Community Health Centre, without comorbidities participated in the study. We used a questionnaire containing 20 questions that was modified by researchers. Its validity was 0.443, and its reliability was 0.945. Wilcoxon test was used to analyse the data. The results showed that the pre-test results of the experimental group showed a mean of 9.35, post-test of 12.95, and a P-value of 0.001. The pre-test results of the control group showed a mean of 11.00, post-test of 10.90, and P value of 0.414. There was also an indepth study of the material by dividing it into small groups and giving booklets so that respondents could remember and do it at home. As for chronic disease patients, the more often they socialize, the less burden they feel.