This study aims to determine the effects of financial literacy, overconfidence, risk perception, loss aversion, herding, and risk tolerance on investors' stock investment decisions in the Purwokerto area. The population in this study are stock investors in the Purwokerto. The sample selection in this study is by convenience sampling. Based on criteria, 117 respondents were used as samples for this study. The analytical technique used in this research is multiple linear regression analysis. This study indicates that financial literacy, risk perception, herding, and risk tolerance have a significant effect on investment decisions. In contrast, overconfidence and loss aversion variables do no have a significant effect on investment decisions.