To improve performance of a door for a temperature-controlled room at a lower cost.
A door for a temperature-controlled room is constituted of an outer door 30 and an inner door 10 mutually shut thermally. The outer door 10 is separated and held by an inner door frame inside large frames 34, 36, 38 of the outer door 30. The inner door frame is a seam plated formed in one united body to a sheet metal of the inner door 10 by punching. This seam plate is fitted to a punched portion 40 or the like of large frame of the outer door 30 by a tenon 22.
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