Electronic Commerce is the new type of business transaction, which sells and advertises the products and services by using the Internet, which is used by more than 500,000,000 people in the worldwide and is spread rapidly to the world. There are no limitations in cyberspace, for example, time, space, and country boundary because every business can be processed in this cyberspace. The use of modern means of communication such as electronic mail and electronic data interchange for the conduct of international trade transactions has been increasing rapidly and is expected to develop further as technical supports such as information highways and the Internet become more widely accessible. However, the communication of legally significant information in the form of paperless messages may be hindered by legal obstacles to the use of such messages, or by uncertainty as to their legal effect or validity. This obstacles pose many difficulties for conducting EC through Internet. The purpose of this thesis is to suggest several issues to be taken into consideration in conducting EC in near future. For this purpose, the article will first take up subjects of what is the present state of EC, what are the legal issues emerging therefrom.