An electric supplying holder includes a first cover, a second cover, a flexible battery unit and a third cover. The second cover has at least one first contact point. The first cover is disposed at a first side of the second cover. The flexible battery unit has at least one conducting part and is placed between the first cover and the second cover. The first contact point is electrically connected with the conducting part. The third cover is disposed at a second side of the second cover, and a first accommodating space is formed between the second cover and the third cover.