To provide a heater circuit of a heating cart which is excellent in measures against troubles with electromagnetic waves as it absorbs and eliminates noises caused by a thermostat, so that enhancement of durability is easily achieved.

This heating cart includes trays 1, which are stored therein while being arranged vertically in a number of steps and each equipped with a heater 2, and pantographs 3 attached to the inside of the cart as they are vertically arranged in a number of steps. A heater circuit is so formed that a pantograph-side power line 4 can be connected to a pantograph-3-side neutral line 5 via first contact terminals A, B, and then via second contact terminals C, D after passing through a tray-1-side thermostat T and the heater 2. Further, a portion of the pantograph-3-side power line 4 is made to branch off and can be connected between the tray-1-side thermostat T and the heater 2 via a capacitor 6 and third contact terminals E, F.