Airbag and airbag apparatus

1. An airbag comprising:

a tab that is inserted into and supported by a substantially flat-plate-shaped bracket disposed on a vehicle,

said tab having, in plan view,

a first slit extending along a direction substantially orthogonal to a direction of inflation and deployment of said airbag, and allowing insertion of said bracket in a normal time, and

a second slit that opens into a point at one end portion or on an intermediate portion of said first slit at an angle intersecting with said first slit.

2. The airbag according to claim 1 , wherein

said second slit extends at least on a side opposite to said direction of inflation and deployment with respect to said first slit.

3. The airbag according to claim 1 , wherein

said second slit opens into said first slit at a point closer to a side of application of a load component to said tab along a direction of extension of said first slit at the time of inflation and deployment of said airbag.

4. The airbag according to claim 1 , wherein

said first slit includes a third slit that extends from a range of insertion of said bracket in the normal time towards a side opposite to said side of application of a load component to said tab along said direction of extension of said first slit at said time of inflation and deployment of said airbag.

5. An airbag apparatus comprising:

the airbag according to claim 1 ; and

an inflator that supplies gas for inflation and deployment of said airbag into said interior of said airbag.