A battery pack includes a bare cell that includes an electrode assembly, a case for accommodating the electrode assembly, and a cap plate arranged at one side of the case, a protection circuit board assembly for controlling charge/discharge of the bare cell, a battery protection device electrically connected to the protection circuit board assembly, and a first adhesive member. At least a part of the first adhesive member is disposed on the case. The first adhesive member crosses the battery protection device in a lengthwise direction of the battery protection device.