PURPOSE: To make it possible to confirm, through the lid, the agitated state of materials in a vessel and the timing to cut the power supply, and thus ease the handling, by making the blade, touching bubbling materials rotate and wipe out the materials scattered on the inside surface of lid, with a contact member fitted to the blade.

CONSTITUTION: To the lid 17 closing an opening of vessel 4, a indication body 23 protruding partially is arranged, and a blade 25 is freely rotatably arranged to the lid 17 on the internal side of vessel 4. The blade 25 and indication body 23 are rotated by the product, which is produced by making the agitation body 10 agitate materials in the vessel 4. In such a cooker, the blade 25 is provided with a rubber or other elastic material-made touching member 27, which slides on the inside surface of lid 17 when the blade 25 is rotated.