A pair of rollers 2 and 3 are provided to be opposed to each other with a predetermined distance wherein at least one of the rollers 2 and 3 is a press print processing roller 2 that has a plurality of processing projections 2a with a predetermined layout on a circumference surface, and a stripe-shaped absorbent body base 1 including an absorbent element 7 obtained by mixing at least pulp 8 with super absorbent polymer 9 is sent and transferred between the pair of rollers 2 and 3 so that at least one surface of the absorbent body base 1 has a plurality of linear pattern elements 1a provided by being squeezed by the processing projections 2a, so as to have a groove-like shape when seen from the top, and are individually spaced from one another and dispersed in a staggered manner.