To provide a method for detecting an occlusion comprising a step of provisionally fixing an occlusion sheet to a tooth and to provide the occlusion sheet having a provisionally fixing mechanism.

The method for detecting the occlusion comprises the steps of coating the occlusion sheet 4 in which a coloring agent 3 is coated on front and rear surfaces or only on one side surface, on teeth 1, 1, etc., in a state in which the agent 3 is disposed on an upper surface of the tooth 1, and deforming metallic core wires 5 arranged on right and left side peripheries of the sheet 4 along a border of the tooth 1 and a gingiva 11 or a border between a labial back part and the gingiva 11, thereby provisionally fixing the sheet 4 to the teeth 1, 1, etc.