A portable pet carrier which can be folded flat for storage when not in use and which can be moved in a horizontal direction with the pet carrier removably attached to a rollable platform having a unique carrying handle rotatable to be at an angle to the pet carrier to permit the pet carrier to be transported from one horizontal location to another with the pet carrier remaining in a horizontal orientation to facilitate the pet's comfort during transportation. The pet carrier is also small enough and flexible enough to be retained under a passenger seat of an airplane.