The study aims to analyze the impact of gender differences on investment decisions in Kathmandu Valley. The study targeted in the investors of financial market of Kathmandu Valley. The investing decisions and financial socialization and contribution are the independent variables in the study. The investment behavior is the dependent variable in the study. The descriptive research design has been adopted in the study. The correlational research design has been used to see the relationship between investors investing decision and investment behavior. The purposive sampling method has been used and the usable sample size is confined to 250. The study concludes significant differences in male and female risk-taking capacity, preferences and confidence level. The investment decision and financial socialization and contribution positively influenced investment behavior of investors.