The present invention's manufacturing method for a sealed battery includes: a process whereby a sealed battery application electrode assembly 11 is formed that has multiple positive electrode substrate exposed portions 14 at one end and multiple negative electrode substrate exposed portions 15 at the other end; a process whereby the negative electrode collector 181 and negative electrode collector receiving part 183 are brought against both surfaces of the part to be welded on at least the negative electrode substrate exposed portions 15, with tape 23a constituted of thermodeposited resin and having an opening 231 in the center being interposed; and a process whereby resistance welding is effected by passing current between the negative electrode collector 181 and negative electrode collector receiving part 183 positioned at the two sides.