A toy block comprising: a main body including a base surface (111; 112) and an accommodation space (SS1; SS2) formed to surround the base surface (111; 112); a plate-shaped magnetic body (120a; 120b) including a first surface and a second surface having different polarities, wherein the plate-shaped magnetic body (120a; 120b) is located in the accommodation space (SS1; SS2), and wherein the first surface or the second surface of the plate-shaped magnetic body (120a; 120b) is seated on the base surface (111; 112); and a guide part (130a; 130b) disposed in the accommodation space (SS1; SS2) and configured to guide rotation of the plate-shaped magnetic body (120a; 120b) such that the other one of said first and second surfaces (121a, 122a) of the plate-shaped magnetic body (120a; 120b) is seated on the base surface after the rotation of the plate-shaped magnetic body (120a; 120b); characterised in that the guide part (130a; 130b) comprises a main guide (131a; 131b) and a sub guide (132a; 132b); wherein the main guide (131a; 131b) extends in an arch shape and includes a plurality of parallel blades that protrude from an inner surface of the accommodation space, so that the main guide (131a; 131b) corresponds to a rotating curved surface of a side surface of the plate-shaped magnetic body (120a; 120b) when the plate-shaped magnetic body (120a; 120b) rotates; wherein sub guide (132a; 132b) extends in a direction different from an extending direction of the main guide (131a; 131b) and has an extending surface parallel to the side surface of the plate-shaped magnetic body (120a; 120b when the plate-shaped magnetic body (12a; 120b) rests on the base surface (111; 112). a main body including a base surface (111; 112) and an accommodation space (SS1; SS2) formed to surround the base surface (111; 112); a plate-shaped magnetic body (120a; 120b) including a first surface and a second surface having different polarities, wherein the plate-shaped magnetic body (120a; 120b) is located in the accommodation space (SS1; SS2), and wherein the first surface or the second surface of the plate-shaped magnetic body (120a; 120b) is seated on the base surface (111; 112); and a guide part (130a; 130b) disposed in the accommodation space (SS1; SS2) and configured to guide rotation of the plate-shaped magnetic body (120a; 120b) such that the other one of said first and second surfaces (121a, 122a) of the plate-shaped magnetic body (120a; 120b) is seated on the base surface after the rotation of the plate-shaped magnetic body (120a; 120b); characterised in that the guide part (130a; 130b) comprises a main guide (131a; 131b) and a sub guide (132a; 132b); wherein the main guide (131a; 131b) extends in an arch shape and includes a plurality of parallel blades that protrude from an inner surface of the accommodation space, so that the main guide (131a; 131b) corresponds to a rotating curved surface of a side surface of the plate-shaped magnetic body (120a; 120b) when the plate-shaped magnetic body (120a; 120b) rotates; wherein sub guide (132a; 132b) extends in a direction different from an extending direction of the main guide (131a; 131b) and has an extending surface parallel to the side surface of the plate-shaped magnetic body (120a; 120b when the plate-shaped magnetic body (12a; 120b) rests on the base surface (111; 112).