A slip-proof grip covering includes a slip-proof tape that has a rear end and a front end and that includes a gripping portion between the rear end and the front end and a first and second folding portion adjacent to the rear end. The first folding portion is folded to the second folding portion. The first folding portion has a first side and a second side opposite to the first side and the second folding portion includes a first side attached to the second side of the first folding portion and a second side contiguous and adjacent to the gripping portion. Each of a thickness of the first folding portion and a thickness of the second folding portion is not thicker than a thickness of the gripping portion.