Provided is a vacuum adiabatic body. The vacuum adiabatic body may include a first plate member defining at least a portion of a wall for a first space, a second plate member defining at least a portion of a wall for a second space having a temperature different from the first space, a sealing part sealing the first plate member and the second plate member to provide a third space that has a temperature between the temperature of the first space and the temperature of the second space and is in a vacuum state, a conduit having at least a portion passing through by the sealing part outside the third space to connect the first space to the second space, a supporting unit or bar maintaining the third space, a heat resistance unit or assembly for reducing a heat transfer amount between the first plate member and the second plate member, and a port or an exhaust port through which air of the third space is exhausted.