Abstract: A swimming pool leak detecting device including an interior housing slidable along a floor and side walls of a swimming pool. A telescopic pole is pivotally coupled with the interior housing. A floating housing is adapted to float on a surface of the swimming pool. The floating housing holds a predetermined amount of water therein. A hose is provided having an upper end fluidly coupled with the floating housing and a lower end fluidly coupled with the interior housing. A leak in the swimming pool will cause the water level in the floating housing to decrease. Sealant can be poured through the floating hosing and directed through the hose to the interior housing in order to seal the leak.