A battery ejecting structure is applied to a portable electronic device which comprises a housing and a battery. The battery ejecting structure comprises an ejecting element, a cover, a pushing element and an elastic element. The ejecting element is movably located in the container of the housing; the cover is connected pivotally to the housing and covers the container to be a closed state, and the cover restricts the ejecting element to move via a blocking element; the pushing element is located in the housing, and the fixed member of the ejecting element is connected to the pushing element through the housing. Wherein when the cover is rotated relative to the housing to form an open state, the blocking element disengages from the container, and the pushing element is moved by an elastic restoring force of the elastic element to unlock the battery.