Disclosed in the present invention are a battery pack for an electric vehicle, and an electric vehicle comprising same. The battery pack for the electric vehicle comprises: a plurality of battery accommodating areas, which are arranged in a width direction of the electric vehicle, the plurality of battery accommodating areas comprising a middle accommodating area and side accommodating areas, and each battery accommodating area accommodating multiple layers of battery modules; and lock connection structures, which are used for matching locking mechanisms on the electric vehicle so as to lock the battery pack on the electric vehicle, the space in a vertical direction is fully utilized, the accommodating number of the battery modules is increased, the capacity of the battery pack is thus improved, the arrangement of the battery modules is rational, and the size of the battery pack in a horizontal direction is not increased.