To provide a manufacturing method of a secondary battery reducing variations in the electric characteristics of the secondary battery, and also to provide a charging/discharging device of the secondary battery.

The manufacturing method of the secondary battery has a charge and discharge process for charging and discharging respective secondary batteries 100 for composing a first battery row 101 (a second battery row 102) by aligning at least three secondary batteries 100. When the secondary batteries positioned at both the ends of the first battery row 101 (the second battery row 102) in the secondary batteries 100 belonging to the first battery row 101 (the second battery row 102) are set to be first end battery 101b (102b) and second end battery 101c(102c), and the secondary battery 100 positioned between the first end battery 101b( 102b) and the second one 101c( 102c) is set to be an intermediate battery, the temperature difference occurring between the first end battery 101b (102b) and the second one 101c (102c) is reduced for charging/discharging in the charge and discharge process.

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