The goal of this study is to determine the effect of Investment.. Knowledge, Investment Risk Perception, and Capital.. Market.. Training on Investment Decisions in the Capital Market with Investment Interest as Moderating Variables. This study employs a quantitative approach, with data collected via a questionnaire. Technical analysis of data using descriptive statistics and multiple regression analysis using moderator variables with absolute difference method. The data was processed using SPSS 26 based on the results of questionnaires from students of Economics Faculty of the University of Maritime Raja Ali Haji who had met the sample criteria. The results obtained show that partially.. investment and capital market training have no effect on investment decisions, but partially.. investment risk perception and investment interest have an effect on investment decisions. Interest does not invest in moderating the effect of investment and capital market training on investment decisions, but interest in investing is able to moderate the effect of risk perception on investment decisions.