The infield square has the four bases at its corners and it is also called the diamond. The diamond is surrounded on two sides by the outfield which is fair territory, and on the other two sides by foul territory.

• 内场为正方形，四个角上各有一个垒位。内场也称“方场”，由界内地区和与外场临界的两个边和界外地区另外两个边围绕而成。