A bottle opener includes a first member and a second member. The first member includes an engaging section. The second member comprises a cap-removal portion and a grip portion. One of the first member and the second member includes two slots defined therein. An axle is slidably extended through the slots for pivotally connecting the first member and the second member. The engaging section engages with a portion of a circumferential end edge of a cap of a bottle to be opened. The grip portion of the second member is movable relative to the cap to a position for engaging with another portion of the circumferential end edge of the cap opposite to the portion of the circumferential end edge of the cap, thereby allowing removal of the cap.