PURPOSE: To enable a transformer carrier to carry a transformer independently of its size and to easily install it in situ without unnecessarily making the ceiling of a doorway higher.

CONSTITUTION: A support jig 16 supporting an assembled transformer 15 is supported by a carrier jig 17 in a liftable manner making its one end serve as a support point, a jack 21 is provided between the jigs 16 and 17, and the support jig 16 is lifted up or pulled down by the expansion or shrinkage of the jack 21 to be changed in tilt angle, whereby the transformer 15 can be changed in height and width when it is carried in for installation. In this case, the transformer 15 can be installed only by hoist after it is carried in. A support point located at the one end of the support jig 16 may be provided movable so as to approach to or recede from the jack 21.