A suspension type robot comprises posts, support arms having apical ends, a traveling rail mounted between the apical ends of the support arms and robot body. Each of the support arms has at the apical end a U-shape-cut portion providing a U-shape opening and a U-shape upper surface surrounding the U-shape opening. The traveling rail has an attachment portion comprising a first cylinder portion and a second cylinder portion. The first cylinder portion is inserted into the U-shape-cut portion. The second cylinder portion is disposed on the first cylinder portion, engaged with the U-shape upper surface, and is larger in diameter than the first cylinder portion. The first cylinder portion is inserted deep into the U-shape-cut portion, and both sides of the U-shape opening of the U-shape-cut portion are extended from the plane of projection of the second cylinder portion.