SLIDING DOOR

PROBLEM TO BE SOLVED: To solve the problem that a plurality of workers are needed for a conventional automatic sliding door because of its workability and safety, and it is difficult to enhance operability.SOLUTION: An automatic sliding door includes a door body 2 which opens and closes a skeleton opening part H; a fitting member 4 which is fixed along an upper side of the skeleton opening part H; a rail body 5 which guides the door body 2 along the upper side of the skeleton opening part H; and a holding part 4A where the fitting member 4 holds the rail body 5 therebelow. The rail body 5 includes an engagement part 15A which engages the holding part 4A from a depth direction, and a fixing part 15B which abuts on an aspect face of the fitting member 4 while the engagement part 15A is engaged with the holding part 4A, and the rail body 5 is fixed to the fitting part 4 with a screw B3 provided on the fixing part 15B, so that even one operator can safely and easily complete construction.