Abstract: A heat-generating sheet (1) for IH cooking heaters composed of a laminate sheet including a conductive layer (3) and a dielectric layer (5). The laminate sheet has a bottom section (10) and a peripheral side wall section (13) and can be folded into the shape of a container A having the conductive layer on the inner side; a plurality of first cutlines (7) are formed at intervals in the peripheral direction in the conductive layer corresponding to the peripheral side wall section of the container A formed by folding and reduce or cut off the induction of an eddy current produced by the induction heating of an IH cooking heater, and a reinforcing ring (20) made of a dielectric material is fixed to the dielectric layer corresponding to the periphery of the bottom section of the container A and keeps the shape of the container A.