To provide an insulated van capable of minimizing temperature rise of a cargo room by preventing internal penetration of outside air when opening a rear wall part of a box body for cold insulation.

In this insulated van, the cargo room 7 is formed in an interior of the box body 1 for cold insulation comprising a front wall part 2, the rear wall part 3, right and left side wall parts 4, a floor wall part 5, and a ceiling wall part 6, the rear wall part 3 can be freely opened, and a cold air supply opening 10a and a suction opening 10b of a refrigerator 10 are provided in an upper front part of the cargo room 7. It is characterized by that a means 12 forming an air curtain so as to block penetration of the outside air into the cargo room 7 when the rear part 3 is opened is provided in the cargo room 7 in a rear end part of the ceiling wall part 6.