PURPOSE: To create a solid assembling toy of which the assembly is complicated by providing marking elements which constitute markings dispersedly on the surfaces of constituent pieces so that the markings such as a graphic, mark, picture, color pattern, character or others, may be put on respective surfaces.

CONSTITUTION: Respective constituent pieces 1-9 can be formed into a cube which has edges of which the length 3a is three times of the length (a) of a short edge of the constituent piece, by assembling the constituent pieces specifically. On respective surfaces of the cube, appropriate markings such as a graphic, mark, etc., are indicated, and, e.g. the numbers of a die are provided in such a manner that 1 and 6, 2 and 5, 3 and 4 may be shown on the confronted side surfaces of the assembled cube. That is, on the front surface lower section, flat surface left section, and left side surface upper section of the constituent piece 1, marking elements 12, 13, and 14 are provided. For the constituent piece 2, marking elements 15, 16 and 17 are provided on the front surface upper section, and left side surface upper and lower sections, and for the constituent piece 3, marking elements 18 and 19 are provided on the flat surface right section and back surface right section. The assembling methods for these constituent pieces have so many varieties, and various assembling examples can be obtained.