Along with technological developments, investment platforms are no longer just capital and financial markets. Technology is driving the emergence of a new investment platform called Equity Crowdfunding (ECF). This study examines the determinants influencing investors’ intention to invest in the ECF Indonesia platform through the Theory of Planned Behavior by adding Attractiveness Return and Perceived Risk variables. This study has collected responses from 348 questionnaires distributed online to respondents. The Structural Equation Modeling-Partial Least Square (SEM-PLS) method was used to test the model developed through the WarpPLS application and for descriptive testing with the SPSS 24 application. The results showed that all constructs Theory of Planned Behavior and Return Attractiveness affected investors’ intention to invest, while Perceived Risk has low significance.