A thermoelectric device, an intermediate, a module, and a method for manufacturing the same are provided, wherein productivity is high, material costs are comparatively low, and there is a low environmental load. A thermoelectric device, wherein a block body has at least one P and N piece made of P-type and N-type materials, which are alternately sandwiched between insulation layers, wherein the adjacent P and N piece boundary portions are welded together, with the P and the N piece of the block body being electrically connected in a zigzag manner, and a plurality of block bodies are arranged in parallel, the block bodies adjacent to each other being bridged by an electrode to extend the electrical connection in the series; an intermediate using such a thermoelectric device; and a thermoelectric module using the intermediate are provided. In this case, as the P-type and N-type materials, any material preferably used for thermoelectric pairs can be used.