A ball serving apparatus for pet including a housing, a rail assembly, and a launch module is provided. The housing has an inlet and an outlet. The rail assembly assembled in the housing is connected to the inlet. The launch module is assembled in the housing and connected between the rail assembly and the outlet. A ball is suitable for being put into the inlet to move in the rail assembly by gravity continuously. After moving to the launch module, the ball is launched out of the housing through the outlet by being driven by the launch module.
