To provide a heat/cold insulating meal service cart capable of preventing thermal leakage when taking out the food tray and making it possible to keep food on each food tray in multiple steps warm or cool certainly.

In this heat/cold insulating meal service cart, an opening/closing door 3 is set on the opening of storage box body 2 set on a cart 1. Separating the inside of storage box body 2 to a warm room 5 and a cold room 6 with a longitudinal partition body 4, the food tray 7, which is capable of putting in and out, is placed in multiple steps above and below at the warm room 5 and a cold room 6. An air outlet 8 is set in each room of warm room 5 and a cold room 6 to form an air curtain, which covers the opening of storage box body 2, when opening the opening closing door 3.