Plugging-type resin cap

A plugging-type resin cap, comprising:

• a cap top surface;
• a skirt wall extending vertically downward from a circumferential edge of the cap top surface;
• an engagement rib formed along an inner side surface of the skirt wall;
• and
• a restraining band tightening the skirt wall,
• the plugging-type resin cap further comprising:
• a tab;
• and
• engagement projections, wherein
• the restraining band has an arcuate restraining portion, stoppers, and an upwardly projecting portion,
• the stoppers are formed to extend radially outward from circumferential both ends of the restraining portion,
• the upwardly projecting portion has two projecting pieces formed to extend upward from the circumferential both ends of the restraining portion and a joint joining the two projecting pieces together,
• the tab has a tab main body formed over an outer side surface of the skirt wall and a hold portion provided under the tab main body,
• the engagement projections are provided over the outer side surface of the skirt wall to be separate from the tab main body, and
• the stoppers and the engagement projections are formed to be fit table with each other.