A tennis ball launcher described wherein one ball at a time is selected from a hopper containing a supply of balls and positioned in a ball feed mechanism on a pair of spaced parallel supports. A mounted rotatable cylinder through which the balls pass from the hopper to the ball feed assembly has a spiral selector fixedly connected thereto. The selector extends into the hopper. The ball feed assembly is mounted independently of the rotatable cylinder and is vertically adjustable. A spring-loaded striker is released from a cocked position and passes between the parallel supports to impact the ball and propel the ball from the launcher. The striker is moved to a cocked position by a striker trigger assembly having a trigger actuator which engages a pin on the striker to move the trigger to a cocked position where the striker is released by the trigger actuator being cammed out of contact with the pin.