A fuel door opener assembly for a push type fuel door includes a pop-up part installed inside a housing and a locking part installed inside the housing. The pop-up part includes a plunger installed to be slidable inside the housing in a state of being elastically supported, a door catch connected to the fuel door, installed to pass through the housing, disposed coaxially with the plunger, brought into contact with an end portion of the plunger, and configured to pop up the fuel door, a cam being selectively restrained by the locking part and configured to restrain sliding of the door catch when restrained by the locking part, and a plunger spring configured to elastically support the plunger toward the door catch inside the housing.