Manufacturing method of fin tube typed heat exchanger and combustion apparatus having the same

Provided are a method for manufacturing a fin tube type heat exchanger that may use a pipe expansion apparatus for a long time and improve productivity, and a combustion apparatus including the fin tube type heat exchanger. The method for manufacturing a fin tube type heat exchanger (51) includes: a pipe expanding process of expanding a thermoelectric pipe (21) by inserting a pipe expansion apparatus (100) into the thermoelectric pipe (21) inserted into an insertion hole (20) of a thermoelectric fin (2). The pipe expanding process includes: a first process of expanding a thermoelectric pipe (21) such that an enlarged diameter prediction range (22) to an insertion hole (20) by expanding the thermoelectric pipe (21) radially into a diameter expansion state in a state in which a pipe expansion apparatus (100) is stopped in the enlarged diameter prediction range (2) in the thermoelectric pipe (21); and a second process of moving the pipe expansion apparatus (100) to the next enlarged diameter prediction range (22