Earmuffs

An earmuff comprising:

• a bowl-shaped housing base that includes a first engagement portion on one side thereof;
• an annular plate-shaped base plate that includes a second engagement portion and a third engagement portion respectively on a first surface and a second surface on a side opposite to the first surface, and is integrated with the housing base by causing the second engagement portion to be engaged with the first engagement portion;
• and
• a pad portion that includes a pad fixed on the one side and a pad base including a fourth engagement portion on the other side opposite to the one side, and is integrated with the base plate by causing the fourth engagement portion to be engaged with the third engagement portion,
• wherein the base plate includes a groove portion adjacent to the third engagement portion and formed at a different position from the third engagement portion, and the pad base includes a rib that enters the groove portion, and
• wherein the rib enters the groove portion and restricts an inclination of the third engagement portion involved with an engagement with the fourth engagement portion in a state where the pad base is integrated with the base plate by causing the fourth engagement portion to be engaged with the third engagement portion.