A game server of the present disclosure comprises: a map data storing section that stores map data; a virtual position data table that stores identification data; a display process data transmitting section that transmits display process data; an operation data receiving section that receives operation data; a virtual user position changing section that changes a virtual user position; a data updating section that updates the identification data; a relationship building section that transmits relevant information regarding a virtual user other than a target virtual user; and an attribute information storing section. The relationship building section sets a screening area covering a predetermined distance from the virtual position of the target virtual user. Also, the relationship building section selects a virtual user with a higher level from among at least one other virtual user in the screening area and transmits relevant information regarding the other virtual user thus selected.