The Gigantinho ("Little Giant" in Portuguese) is an indoor sports arena in Porto Alegre, Brazil.

It is located in the riverside Beira-Rio complex of Sport Club Internacional, next to the "Gigante" ("Giant") stadium.

Covering 7,200 square meters, the arena includes an indoor football pitch.

There are thirteen bathrooms (six women, six men and one for the disabled), six changing rooms, and eleven bars.

The gym houses the Foundation for Education and Culture of SCI (FECI), where the library is located.