A portable training device is used for improving putting skills of a player by putting a ball. A plurality of sections are removably connected with one another to define an upper section and a lower section presenting an inclined axis. At least one compartment is defined in each of the sections for receiving the ball. A channel defined in at least one of the sections extends parallel the inclined axis and communicates with the at least one compartment to receiving the ball and returning the ball trough at least one of the channels.