Background: Schizophrenia is a syndrome with various causes and wide range of development, alongside with numbers of effects regarding the genetic and physical factors, and social cultures. Generally, it is marked by a deviation in fundamental matters and characteristics in thinking and perception, along with unreasonable affect. Consciousness and intellectual skills are usually maintained, though certain cognitive retardations may develop. Schizophrenics are marked by impairment in previous functional skills, can be observed in their job, social relations, and self-maintaining. Psychoeducation is an informative education about diseases and treatment, allowing emotional integration that gives opportunity for the paticipants - the patients and their family to overcome the disease. This education is systematic and structured. This study is to determine the effect of psychoeducation toward social function in schizophrenics. Method: This study used quasy experiment with pre-test and post-test with one group design. Sampling technique used was purposive sampling. Total sample of 28 with intervention group. Intervention was done for 6 times in Tempel Community Health Facility, Temon I, Srandakan, and Playen II, Yogyakarta from December 2016 until April 2017. Result: Study results showed mean value of the pre-test as 84.5% and mean value of the post-test as 94.0%. Non-parametric study using Wilcoxon showed p=0.000. With p<0.05, it can be concluded that psychoeducation effects social function in shizophrenics.