The purpose of research to determine the influence of competence, confidence, stock prices on the behavior of stock trading. Independent variables in this study are competence, confidence and stock prices, while the dependent variable is the behavior of stock trading. The object of this study is the student investor listed in the sharia investment gallery of the Indonesian stock exchange (GISBEI) and is a faculty student of economics and business of muhammadiyah university Purwokerto, this research uses 112 sample of respondents. Data collection technique used is purposive sampling while data analysis technique used in this research is validity and reliability test, descriptive statistic, assumption test of classic, multiple regression analysis and hypothesis test. The results show that competence, confidence, stock price, gender and age simultaneously affect the behavior of stock trading. Competence, confidence and share price each have a significant partial positive effect on stock trading behavior, while gender and age respectively negatively influence not partially to the behavior of stock trading.