A vacuum adiabatic body includes a first plate; a second plate; a seal; a support; a heat resistance unit; and an exhaust port, wherein the heat resistance unit includes a conductive resistance sheet connected to at least one of the first and second plates, the conductive resistance sheet resisting heat conduction flowing along a wall for the third space, the conductive resistance sheet includes a mounting part mounted on the first or second plate and a curved part having at least one portion depressed into the third space, a coupler that fixes the conductive resistance sheet to the first or second plate is formed on the mounting part, and the curved part includes a first curved part depressed toward the third space and a second curved part extending from the first curved part, the second curved part surrounding an edge portion of the first or second plate.