Water gun for toy

PURPOSE: A water pistol toy is provided, which can be used for a long time and removes a troublesome of filling water frequently. CONSTITUTION: A water pistol toy comprises a first water pistol(100) and a second water pistol(200). The first water pistol includes: a first water tank in which the water is saved; a nozzle through which the water is sprayed to the outside; a first flow path interlinking the first water tank and nozzle; and a first trigger for spraying water through nozzle to the outside by opening the first flow path; and an additional flow path for supplying water to the first flow path. The second water pistol includes: a second water tank in which the water is saved; a connection nozzle which is detachably combined with the additional flow path of the first water pistol; a second fluid path interlinking the second water tank and connection nozzle; and a second trigger supplying the water to the connection nozzle by opening the second fluid path.