To enable multipurpose application of a playing field along with a proper size for children.

This playing field comprises a plurality of rectangular plates 1 and a channel-like concave running course 2 is made up of plane parts 3 not for running. A means is provided to make a wider running course by connecting each one plate 1 to the side of another plate 1. A plurality of plates can be further arranged one right upon another by an interval holder 7. Holes 6 for insertion of additional toys can be arrayed on the plates 1. This allows the size of a highly versatile playing field to match children.