To provide a transformer support leg which is horizontally arranged between a transformer and a drum can in accordance with a curved surface of the transformer or the drum can, thereby reliably fixing the transformer in the drum can.

A support leg interposed between a pole transformer and an inner wall of a drum can comprises: a transformer pressing member 1 which presses the pole transformer; a can pressing member 4 which presses the inner wall of the drum can; a leg member 7 which supports the transformer pressing member 1 and the can pressing member 4; and a compression spring 13 which is interposed on the leg member 7. After inserting a leg 8 into the compression spring 13 and engaging the leg 8 into a recess of a transformer pressing part 3, a cylindrical adjustment part 10 is rotated to adjust its position.