To make it possible to change freely a running course and to play pleasantly having a running toy run for a long time, by composing a running course consisting of curves, straight lines and cross courses so that one guide board is fixed/held with the guide board holders.

Both sides of the guide board holder 3 are grooved to allow each one top end of the guide boards 1, 2 to be put thereinto so that they can freely be assembled/disassembled, respectively, to fix/hold them to nip the guide board holder 3 from the both sides. Likewise, each top end of any number of guide boards 6, 7...n following after the guide boards l, 2 is put-into/fixed-to/ held-at each groove of the guide board holders 8, 9...n. Freely laying out any curve/straight line to assemble the guide boards to complete a running course, thus, allowing the various size curving/lengthy straight line courses to be combined to complete a variety of course patterns and a circuit course rich in variety.