A blade for a reciprocating saw includes: an elongated body having one end that is detachably attachable to the reciprocating saw; and at least one hard tip having a greater hardness than the body and being bonded to the body. The body includes a cutting edge part having a plurality of teeth arranged along the length direction and a back part extending along the length direction on the side opposite to the cutting edge part in a width direction. The cutting edge part includes at least one curved part. The curved part(s) is (are each) configured so that a cutting edge line, which is a line connecting the tips of a plurality of teeth disposed along the curved part(s), curves in a concave manner toward the back part. The at least one hard tip is bonded to at least one of the plurality of teeth.

A band saw blade includes a generally planar blade backer having generally parallel right and left sides opposite each other. The blade also includes a plurality of consecutive sets of teeth disposed on a top edge of the blade backer. Each set includes a first straight tooth, a second set tooth, following the first straight tooth and being one of left-set or right-set, a third set tooth, following the second set tooth and being the other of left-set or right set, a fourth set tooth, following the third set tooth and being set in the same direction as the second set tooth, and a fifth set tooth, following the fourth set tooth and being set in the same direction as the third set tooth.