An automatic pet feeder includes a displacement module, a feed container, a feed bucket, and a discharge assembly, and the feed container moves along a displacement path at one of a food eating position and a feeding position, The displacement path is at an angle to the horizontal plane, wherein the angle is greater than zero, the feed container is displaced upward by the displacement module on the displacement path, and the feed container is displaced downward by the gravity attraction on the displacement path, the feed bucket Located above the feed container, and defining a feed accommodating space, and forming a discharge port communicating with the feed accommodating space, the discharge assembly is disposed on the feed bucket and located at the discharge port When the feed container is moved to the feeding position, the discharge assembly corresponds to the feed container.一種自動寵物餵食器包含一位移模組、一飼料容器、一飼料桶，及一出料組件，該飼料容器沿著一位移路徑移動在一放食位置及一補料位置之其中一者，該位移路徑與水平面夾一角度，其中，該角度大於零，該飼料容器被該位移模組帶動在該位移路徑上向上位移，該飼料容器受重力吸引在該位移路徑上向下位移，該飼料桶位於該飼料容器的上方，且界定一飼料容置空間，並形成與該飼料容置空間連通的一出料口，該出料組件設置在該飼料桶上，並位在該出料口的位置，當該飼料容器移動到該補料位置時，該出料組件恰對應該飼料容器。
