The sizes of the parts (31p) which do not contribute to joining at joining concaveparts (31) are reduced. A laminated body comprises a first sheet-like member(11) which has through holes (12) arranged in the same lengthwise direction,a second sheet-like member (21) superimposed on the first sheet-like member(11), and the joining concave parts (31) which are formed at the first sheet-likemember (11) and/or the second sheet-like member (21) to join the first sheet-likemember (11) and the second sheet-like member (21) with each other and whose lengthwisedirection is inclined with respect to the lengthwise direction of the throughholes (12).
