The aim of this research is to examine the relationships between optimism, perceived social support and hope. The dependent variable of this research is optimism and its independent variables are perceived social support and hope. The study group consists of 435 teacher candidates, as 331 females (76.1%) and 104 males (23.9%). In the research, the Life Orientation Test, the Multidimensional Scale of Perceived Social Support, the Adult Trait Hope Scale and personal information form were used as data collection tools. Correlational research model was used in the research. The data were analyzed using SPSS (21.0) program. In the analysis of the data, t-test, one-way variance analysis, Pearson correlation coefficient and multiple linear regression analysis were used. According to the findings of the study, it was found that the optimism of teacher candidates did not differ significantly according to gender, but differed significantly according to perceived income level and perceived parental attitude. A positive relationship was found between optimism and perceived social support and hope. It was found that perceived social support and hope variables predicted optimism. The findings were discussed based on the literature and suggestions were developed.