We have developed “TOUCH VOLLEY”. It is a tactical support system for volleyball by using two laptop personal computers connected by wireless LAN. Each computer can implement by using a touch sensor func tion on display. The developed system is consisted of three functions: Data input, Tactical support and Data analysis. In this paper we describe Data input function. The input item on Data input function is as follows; “Service and Receive against the service” and “Spiking and Digging”. The user can input the game data on a trajectory of service and spiking by touching the display directly. The way of fundamental input procedure is as follows ; (1) Input the number of players who served and received by touching a player button on display. (2) Input the position where the player spiked or served by touching court position of directly. (3) Input received position. (4) Input receiver. The user can use this system easily during the game because of the only four steps. Moreover, the user can choose next 4 items as the need arises: “Evaluation of Service and Receive”, “Kinds of Attacking”, “Evaluation of Blocking” and “Evaluation of Digging”. The user can get accustomed to input operation of this system easily and exactly. It is needed only 1 match for the user to get familiarized with inputting game data.