A connector system for a vehicle antenna is a system by joining a fixed connector having legs connected to a terminal of the vehicle antenna, with a movable connector that is removably connected to the fixed connector and has a cable connected to a signal receiving apparatus. A first slide mechanism is located on the fixed connector, extended along a surface where the legs touch, and the second slide mechanism, able to be fitted in the slide mechanism on the fixed connector, is located on the movable connector. By sliding the first slide mechanism and the second slide mechanism to be fitted in each other, the movable connector can be joined to the fixed connector along the surface where the connector system is installed.