In most cases, a hot, corrosive
atmosphere is created in, for example, a
semiconductor wafer processing chamber. When an arm including belts, such as steel belts, is moved into such a
semiconductor wafer processing chamber, the belts are exposed to the hot, corrosive
atmosphere. Belts, such as steel belts, have limited
heat resistance and
corrosion resistance and the hot, corrosive
atmosphere in the
processing chamber shortens the life of the belts. A carrying device of the present invention has a frog
leg type arm (3) and a
wafer holder (4) connected to the frog
leg type arm (3). The wafer holder (4) is pivotally connected to front end parts of a first front arm (8A) and a second front arm (8B) by coaxial joints (10). The wafer holder (4) is linked to the first front arm (8A) and the second front arm (8B) by a posture maintaining linkage (5) including two antiparallel linkages capable of controlling the turning of the wafer holder (4) relative to the first and the second front arms (8A, 8B).