Terminal component, secondary battery provided therewith, and method for manufacturing terminal component

A method for manufacturing a terminal component, comprising:

• a step of preparing a first metal having a recess where an inside is wider than an opening;
• a step of preparing a second metal;
• and
• a step of metal-joining the first metal and the second metal to each other, wherein
• in the step of metal-joining,
• the second metal is overlapped on the portion of the first metal where the recess has been formed,
• the second metal is locally pressurized at a position corresponding to the recess of the first metal, a recess is formed in the second metal and a part of the second metal is caused to enter the portion of the recess of the first metal where the inside is wider than the opening, and
• the part of the second metal that has entered the recess of the first metal is metal-joined to the first metal.