Coreless paper roll manufacturing method

A paper roll manufacturing method comprising:

• a first step for winding up paper to form paper roll having a roll shape;
• a second step for inserting an insertion section, which ejects an adhesive, into a center hole of the paper roll;
• a third step for causing the adhesive to adhere to a predetermined position of the center hole;
• and
• a fourth step for performing a heating and drying process on an area to which the adhesive is adhered so as to harden opposite ends of the center hole,
• wherein the third step includes causing the adhesive to adhere to near opposite extending ends of the center hole, the adhesive having adhesive strength to an extent that the paper wound up into the roll shape is peelable when the paper roll is to be used, and
• wherein the fourth step includes drying the adhesive adhered to the center hole before the adhesive spreads from the predetermined position of the center hole.