A container for electromagnetic cookers capable of heating food and adaptable for pan-confirmation frequencies different by manufacture of the electromagnetic cooker, having a heating characteristic adequately and easily settable, excellent in distributability, use form, disposability and cooking convenience, and having a high heating efficiency suitable for retort pouches, instants, and so forth. A container for electromagnetic cookers comprising a container body of a nonconductive material and a conductive layer formed on the bottom of the container. The high-frequency resistance rate-of-variation (R-R0)/R0 with respect to the pan-confirmation frequency of the heating coil of the conductive layer is 5.3 or more, and the inductance rate-of-variation (L-L0)/L0 is -0.17 or less. R is the high-frequency resistance (O) when viewed from the heating coil, R0 is the high-frequency resistance (O) when viewed from the heating coil with no load, L is the inductance ([mu]H) when viewed from theheating coil, and L0 is the inductance ([mu]H) when viewed from the heating coil with no load.