To provide a holding device capable of determining an initial position in the rotational direction to be a reference and carrying out returning motion to the initial position everytime when a product is carried.

A positioning jig means 17 to make contact with a side surface of an article 19 is provided on a base part 3 fixed on a finger of a robot in a holding device installed on a finger of a robot arm 1 and to carry the article 19 by a suction means 15. Additionally, linear route guide mechanisms 5, 9 to move the suction means 15 in the X direction and the Y direction against the base part 3, a driving means 10, and a rotating guide mechanism 12 to rotate the suction means 15 against a drive means, etc., and the base part 3 are provided.