Method for manufacturing secondary cell

A method for manufacturing a secondary cell, comprising:

• a step of depressurizing an interior of a cell case in a state in which a wound body is housed in the cell case;
• a step of pouring an electrolytic solution into the cell case;
• and
• a step of sealing the cell case, the method further comprising:
• a step of producing a negative pressure in a wound body internal space, which is an internal space of the wound body, in the step of depressurizing the interior of the cell case, and
• air-tightly sealing the wound body internal space with respect to a wound body external space, which is a space between the cell case and the wound body, in a state with a negative pressure in the wound body internal space;
• and
• a step of opening the inside of the cell case to the atmosphere in a state in which the wound body internal space is air-tightly sealed with respect to the wound body external space, wherein
• the step of sealing the cell case is performed in a state in which the wound body internal space is air-tightly sealed with respect to the wound body external space and the inside of the cell case is open to the atmosphere.