Abstract: Timer Activated Doggie Door Opener is an automatic pet door that has a timer and motor to allow the door to open at designated times of the day. To use the preferred embodiment of Timer Activated Doggie Door Opener, a user selects a door or exterior wall to install the device and cuts an appropriate sized opening in the wall or door to accommodate the pet door. The user then attaches the frame and tracks of the device to the wall or door. A user then plugs the timer into a standard wall outlet and sets the timer to go on at a selected time. When the appropriate time is reached, power is sent to the motor which begins to reel the wire connected to the pet door into the housing of the motor, causing the pet door to slide along the upper and lower tracks to reveal the opening in the door or wall. When the user decides to close the pet door, he simply applies manual force to the pet door to cause the reeled in wire to unwind from the housing and allow the pet door to again cover the opening in the door or wall.