A card holder includes a card tray, a card cover and a first connecting rod. The card tray is configured to accommodate a data card. The card cover is rotatably connected to the card tray, and includes opposite first and second ends and a first protrusion extending towards the card tray. The first connecting rod has an end connected to the card tray and another end rotatably connected to the card cover, and is configured to rotate relative to the card cover such that the card cover approaches to or is away from the card tray. When the card holder is inserted into a housing and a pushing force is applied to the first end, the card cover is rotatable about the first protrusion such that the first end extends further into the housing and the second end extends out of the housing. An electronic device is also provided.