To attain a complete barrier-free state by manufacturing an automatic door and a sliding door, which have required grooves for a bracing, so as not to be shaken even when there is no groove so that the aged, little kids and the sick do not stumble.

In the automatic door and the sliding door, sash sheaves 1 are stacked at three stages on a bolt 3 fixed to a left section in the case of a sliding, and a guard 7 assembled in a lower stile 5 is engaged with sash-sheave frees 2 at multiple levels left and right.