Abstract: The method of superposing a strip member pertaining to the present invention including the steps of conveying first and second strip members arranged in two rows and side by side in the widthwise direction thereof in parallel to each other, from an upstream side toward a downstream side in the longitudinal direction thereof, looping either the first or the second strip member in a manner to describe a spiral whose axis extends in a direction intersecting the longitudinal direction of the strip member to be looped and thereby delivering the looped strip member to the row of the other strip member, and superposing the first and second strip members thus rearranged into a single row so as to be integrated.