Research evaluates the impact of transformational leadership on team member exchange quality and employees’ proactive work behavior. With a sample size of 619 employees working at 50 business brands of electronic (E-COMMERCE) in Vietnam, results of analyzing data with SPSS and AMOS shows the same impact of transformational leadership on team member exchange quality and team member exchange quality on OCBs. | Kỷ yếu Hội thảo quốc tế Thương mại và phân phối lần 1 năm 2018 THE IMPACT OF TRANSFORMATIONAL LEADERSHIP ON THE QUALITY OF MEMBER EXCHANGE ON PROACTIVE WORK BEHAVIOUR OF EMPLOYEE OF E-COMMERCE IN VIETNAM TÁC ĐỘNG CỦA LÃNH ĐẠO CHUYỂN DẠNG ĐẾN CHẤT LƯỢNG MỐI QUAN HỆ NHÂN VIÊN VÀ HÀNH VI TÍCH CỰC CỦA NHÂN VIÊN TẠI CÁC DOANH NGHIỆP THƯƠNG MẠI ĐIỆN TỬ Ở VIỆT NAM Dr. Nguyen The Khai Open University of Ho Chi Minh city Email khaidba2012@ MBA. Do Thi Thanh Truc Sai Gon University of Technology Email dotruc76@ MBA. Do Van Tu Phan Thiet University Email Tan Nguyen Tat Thanh University Email htan@ MBA. Nguyen Thi Hoang Nguyen Yersin Da Lat University Email nguyennth@ Abstract Research evaluates the impact of transformational leadership on team member exchange quality and employees proactive work behavior. With a sample size of 619 employees working at 50 business brands of electronic E-COMMERCE in Vietnam results of analyzing data with SPSS and AMOS shows the same impact of transformational leadership on team member exchange quality and team member exchange quality on OCBs. Research also indicates the mediater role of team member exchange quality in the relationship between transformational leadership and proactive work behavior such as Organizational citizenship behaviors benefiting specific individuals OCBI Organizational citizenship behaviors benefiting the organization OCBO and In-role behaviors IRB . Research provides more information about the factors affecting proactive work behavior and therefore suggests the direction of follow-up research as well as management implications that help enterprises enhance effectiveness and competitive advantages in today s changing e-commerce environment. Keywords Transformational leadership team member exchange innovative work behavior SMEs. Tóm tắt Nghiên cứu đánh giá tác động của phong cách lãnh đạo chuyển dạng đến chất lượng mối quan hệ nhân viên và hành .